objtool: Use macros to define arch specific reloc types

Make relocation types architecture specific.

Tested-by: Naveen N. Rao <[e-mail]>
Reviewed-by: Naveen N. Rao <[e-mail]>
Reviewed-by: Christophe Leroy <[e-mail]>
Acked-by: Peter Zijlstra (Intel) <[e-mail]>
Acked-by: Josh Poimboeuf <[e-mail]>
Signed-off-by: Sathvika Vasireddy <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

tools/objtool/arch/x86/include/arch/elf.h

···
 #define _OBJTOOL_ARCH_ELF
 
 #define R_NONE R_X86_64_NONE
+#define R_ABS64 R_X86_64_64
+#define R_ABS32 R_X86_64_32
 
 #endif /* _OBJTOOL_ARCH_ELF */

tools/objtool/check.c

···
 		memset(loc, 0, addrsize);
 
 		if (elf_add_reloc_to_insn(file->elf, sec, idx,
-					  R_X86_64_64,
+					  addrsize == sizeof(u64) ? R_ABS64 : R_ABS32,
 					  insn->sec, insn->offset))
 			return -1;