[POWERPC] Switch to generic compat_binfmt_elf code

This switches the CONFIG_PPC64 support for 32-bit ELF to use the
generic fs/compat_binfmt_elf.c implementation instead of our own
binfmt_elf32.c.  Since so much is the same between 32/64, there is
only one macro we have to define to make the generic support work out
of the box.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index d21495f..8dcac0b 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -97,6 +97,7 @@
 config COMPAT
 	bool
 	default y if PPC64
+	select COMPAT_BINFMT_ELF
 
 config SYSVIPC_COMPAT
 	bool