powerpc/syscalls: switch rtas(2) to SYSCALL_DEFINE

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
[mpe: Update sys_ni.c for s/ppc_rtas/sys_rtas/]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 3f1c4fc..8afd146 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -26,6 +26,7 @@
 #include <linux/memblock.h>
 #include <linux/slab.h>
 #include <linux/reboot.h>
+#include <linux/syscalls.h>
 
 #include <asm/prom.h>
 #include <asm/rtas.h>
@@ -1050,7 +1051,7 @@
 }
 
 /* We assume to be passed big endian arguments */
-asmlinkage int ppc_rtas(struct rtas_args __user *uargs)
+SYSCALL_DEFINE1(rtas, struct rtas_args __user *, uargs)
 {
 	struct rtas_args args;
 	unsigned long flags;