powerpc: Fix little endian coredumps

We need to set ELF_DATA correctly on LE coredumps.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/include/uapi/asm/elf.h

@@ -109,7 +109,6 @@ typedef elf_gregset_t32 compat_elf_gregset_t;
 # define ELF_GREG_TYPE	elf_greg_t64
 # define ELF_ARCH	EM_PPC64
 # define ELF_CLASS	ELFCLASS64
-# define ELF_DATA	ELFDATA2MSB
 typedef elf_greg_t64 elf_greg_t;
 typedef elf_gregset_t64 elf_gregset_t;
 #else
@@ -118,11 +117,16 @@ typedef elf_gregset_t64 elf_gregset_t;
 # define ELF_GREG_TYPE	elf_greg_t32
 # define ELF_ARCH	EM_PPC
 # define ELF_CLASS	ELFCLASS32
-# define ELF_DATA	ELFDATA2MSB
 typedef elf_greg_t32 elf_greg_t;
 typedef elf_gregset_t32 elf_gregset_t;
 #endif /* __powerpc64__ */
 
+#ifdef __BIG_ENDIAN__
+#define ELF_DATA	ELFDATA2MSB
+#else
+#define ELF_DATA	ELFDATA2LSB
+#endif
+
 /* Floating point registers */
 typedef double elf_fpreg_t;
 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];