x86: compat_binfmt_elf

This switches x86-64's 32-bit ELF support to use the shared
fs/compat_binfmt_elf.c code instead of our own ia32_binfmt.c.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 1992b8f..d89b945 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1532,6 +1532,7 @@
 config IA32_EMULATION
 	bool "IA32 Emulation"
 	depends on X86_64
+	select COMPAT_BINFMT_ELF
 	help
 	  Include code to run 32-bit programs under a 64-bit kernel. You should
 	  likely turn this on, unless you're 100% sure that you don't have any