[PATCH] ppc64: Fix PER_LINUX32 behaviour

This patch fixes some bugs in the ppc64 PER_LINUX32 implementation,
noted by Juergen Kreileder:

* uname(2) doesn't respect PER_LINUX32, it returns 'ppc64' instead of 'ppc'
* Child processes of a PER_LINUX32 process don't inherit PER_LINUX32

Along the way I took the opportunity to move things around so that
sys_ppc32.c only has 32-bit syscall emulation functions and to remove
the obsolete "fakeppc" command line option.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/asm-ppc64/elf.h

@@ -221,9 +221,7 @@ do {								\
 		set_thread_flag(TIF_ABI_PENDING);		\
 	else							\
 		clear_thread_flag(TIF_ABI_PENDING);		\
-	if (ibcs2)						\
-		set_personality(PER_SVR4);			\
-	else if (current->personality != PER_LINUX32)		\
+	if (personality(current->personality) != PER_LINUX32)	\
 		set_personality(PER_LINUX);			\
 } while (0)