powerpc: Fix lwsync feature fixup vs. modules on 64-bit

Anton's commit enabling the use of the lwsync fixup mechanism on 64-bit
breaks modules. The lwsync fixup section uses .long instead of the
FTR_ENTRY_OFFSET macro used by other fixups sections, and thus will
generate 32-bit relocations that our module loader cannot resolve.

This changes it to use the same type as other feature sections.

Note however that we might want to consider using 32-bit for all the
feature fixup offsets and add support for R_PPC_REL32 to module_64.c
instead as that would reduce the size of the kernel image. I'll leave
that as an exercise for the reader for now...

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/lib/feature-fixups.c

@@ -112,7 +112,8 @@ void do_feature_fixups(unsigned long value, void *fixup_start, void *fixup_end)
 
 void do_lwsync_fixups(unsigned long value, void *fixup_start, void *fixup_end)
 {
-	int *start, *end, *dest;
+	long *start, *end;
+	unsigned int *dest;
 
 	if (!(value & CPU_FTR_LWSYNC))
 		return ;