[POWERPC] kernel_execve is identical in 32 and 64 bit

so consolidate it into misc.S.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/misc.S b/arch/powerpc/kernel/misc.S
index 330c9dc..74ce0c7 100644
--- a/arch/powerpc/kernel/misc.S
+++ b/arch/powerpc/kernel/misc.S
@@ -14,6 +14,7 @@
  * 2 of the License, or (at your option) any later version.
  */
 #include <asm/ppc_asm.h>
+#include <asm/unistd.h>
 
 	.text
 
@@ -43,3 +44,10 @@
 	add	r3,r3,r5
 	mtlr	r0
 	blr
+
+_GLOBAL(kernel_execve)
+	li	r0,__NR_execve
+	sc
+	bnslr
+	neg	r3,r3
+	blr