[CVE-2009-0029] powerpc: Enable syscall wrappers for 64-bit

This enables the use of syscall wrappers to do proper sign extension
for 64-bit programs.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 84b8613..e39b73b 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -123,6 +123,7 @@
 	select HAVE_DMA_ATTRS if PPC64
 	select USE_GENERIC_SMP_HELPERS if SMP
 	select HAVE_OPROFILE
+	select HAVE_SYSCALL_WRAPPERS if PPC64
 
 config EARLY_PRINTK
 	bool