This fixes tests on 32 bits platforms. Patch taken from upstream.

commit f8872e29ce06d78d3db71b3ab26a7465fc8a9586
Author: David Gibson <david@gibson.dropbear.id.au>
Date:   Fri Oct 6 23:07:30 2017 +1100

    tests: Avoid 64-bit arithmetic in assembler
    
    For testing we (ab)use the assembler to build us a sample dtb, independent
    of the other tools (dtc and libfdt) that we're trying to test.  In a few
    places this uses 64-bit arithmetic to decompose 64-bit constants into
    the individual bytes in the blob.
    
    Unfortunately, it seems that some builds of GNU as don't support >32 bit
    arithmetic, though it's not entirely clear to me which do and which don't
    (Fedora i386 does support 64-bit, Debian arm32 doesn't).
    
    Anyway, to be safe, this avoids 64-bit arithmetic in assembler at the cost
    of some extra awkwardness because we have to define the values in 32-bit
    halves.
    
    Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

diff --git a/tests/testdata.h b/tests/testdata.h
index 3588778..f6bbe1d 100644
--- a/tests/testdata.h
+++ b/tests/testdata.h
@@ -4,15 +4,25 @@
 #define ASM_CONST_LL(x)	(x##ULL)
 #endif
 
-#define TEST_ADDR_1	ASM_CONST_LL(0xdeadbeef00000000)
-#define TEST_SIZE_1	ASM_CONST_LL(0x100000)
-#define TEST_ADDR_2	ASM_CONST_LL(123456789)
-#define TEST_SIZE_2	ASM_CONST_LL(010000)
+#define TEST_ADDR_1H	ASM_CONST_LL(0xdeadbeef)
+#define TEST_ADDR_1L	ASM_CONST_LL(0x00000000)
+#define TEST_ADDR_1	((TEST_ADDR_1H << 32) | TEST_ADDR_1L)
+#define TEST_SIZE_1H	ASM_CONST_LL(0x00000000)
+#define TEST_SIZE_1L	ASM_CONST_LL(0x00100000)
+#define TEST_SIZE_1	((TEST_SIZE_1H << 32) | TEST_SIZE_1L)
+#define TEST_ADDR_2H	ASM_CONST_LL(0)
+#define TEST_ADDR_2L	ASM_CONST_LL(123456789)
+#define TEST_ADDR_2	((TEST_ADDR_2H << 32) | TEST_ADDR_2L)
+#define TEST_SIZE_2H	ASM_CONST_LL(0)
+#define TEST_SIZE_2L	ASM_CONST_LL(010000)
+#define TEST_SIZE_2	((TEST_SIZE_2H << 32) | TEST_SIZE_2L)
 
 #define TEST_VALUE_1	0xdeadbeef
 #define TEST_VALUE_2	123456789
 
-#define TEST_VALUE64_1	ASM_CONST_LL(0xdeadbeef01abcdef)
+#define TEST_VALUE64_1H	ASM_CONST_LL(0xdeadbeef)
+#define TEST_VALUE64_1L	ASM_CONST_LL(0x01abcdef)
+#define TEST_VALUE64_1	((TEST_VALUE64_1H << 32) | TEST_VALUE64_1L)
 
 #define PHANDLE_1	0x2000
 #define PHANDLE_2	0x2001
diff --git a/tests/trees.S b/tests/trees.S
index 9854d1d..9859914 100644
--- a/tests/trees.S
+++ b/tests/trees.S
@@ -7,16 +7,6 @@
 	.byte	((val) >> 8) & 0xff ; \
 	.byte	(val) & 0xff	;
 
-#define FDTQUAD(val) \
-	.byte	((val) >> 56) & 0xff ; \
-	.byte	((val) >> 48) & 0xff ; \
-	.byte	((val) >> 40) & 0xff ; \
-	.byte	((val) >> 32) & 0xff ; \
-	.byte	((val) >> 24) & 0xff ; \
-	.byte	((val) >> 16) & 0xff ; \
-	.byte	((val) >> 8) & 0xff ; \
-	.byte	(val) & 0xff	;
-
 #define TREE_HDR(tree) \
 	.balign	8		; \
 	.globl	_##tree		; \
@@ -33,14 +23,16 @@ tree:	\
 	FDTLONG(tree##_strings_end - tree##_strings) ; \
 	FDTLONG(tree##_struct_end - tree##_struct) ;
 
-#define RSVMAP_ENTRY(addr, len) \
-	FDTQUAD(addr)		; \
-	FDTQUAD(len)		; \
+#define RSVMAP_ENTRY(addrh, addrl, lenh, lenl) \
+	FDTLONG(addrh)		; \
+	FDTLONG(addrl)		; \
+	FDTLONG(lenh)		; \
+	FDTLONG(lenl)
 
 #define EMPTY_RSVMAP(tree) \
 	.balign	8		; \
 tree##_rsvmap:			; \
-	RSVMAP_ENTRY(0, 0) \
+	RSVMAP_ENTRY(0, 0, 0, 0) \
 tree##_rsvmap_end:		;
 
 #define PROPHDR(tree, name, len) \
@@ -52,9 +44,10 @@ tree##_rsvmap_end:		;
 	PROPHDR(tree, name, 4) \
 	FDTLONG(val)		;
 
-#define PROP_INT64(tree, name, val) \
+#define PROP_INT64(tree, name, valh, vall) \
 	PROPHDR(tree, name, 8) \
-	FDTQUAD(val)		;
+	FDTLONG(valh)		; \
+	FDTLONG(vall)		;
 
 #define PROP_STR(tree, name, str) \
 	PROPHDR(tree, name, 55f - 54f) \
@@ -81,16 +74,16 @@ tree##_##name:			; \
 
 	.balign	8
 test_tree1_rsvmap:
-	RSVMAP_ENTRY(TEST_ADDR_1, TEST_SIZE_1)
-	RSVMAP_ENTRY(TEST_ADDR_2, TEST_SIZE_2)
-	RSVMAP_ENTRY(0, 0)
+	RSVMAP_ENTRY(TEST_ADDR_1H, TEST_ADDR_1L, TEST_SIZE_1H, TEST_SIZE_1L)
+	RSVMAP_ENTRY(TEST_ADDR_2H, TEST_ADDR_2L, TEST_SIZE_2H, TEST_SIZE_2L)
+	RSVMAP_ENTRY(0, 0, 0, 0)
 test_tree1_rsvmap_end:
 
 test_tree1_struct:
 	BEGIN_NODE("")
 	PROP_STR(test_tree1, compatible, "test_tree1")
 	PROP_INT(test_tree1, prop_int, TEST_VALUE_1)
-	PROP_INT64(test_tree1, prop_int64, TEST_VALUE64_1)
+	PROP_INT64(test_tree1, prop_int64, TEST_VALUE64_1H, TEST_VALUE64_1L)
 	PROP_STR(test_tree1, prop_str, TEST_STRING_1)
 	PROP_INT(test_tree1, address_cells, 1)
 	PROP_INT(test_tree1, size_cells, 0)