[IA64] Fix a typo in arch/ia64/kernel/entry.S

Both 2.4 and 2.6 kernels need this patch for the next binutils.

Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index 69f88d56..bb9a506 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -1249,7 +1249,7 @@
  	stf.spill [r17]=f11
 	adds out0=16,sp				// out0 = &sigscratch
 	br.call.sptk.many rp=ia64_rt_sigreturn
-.ret19:	.restore sp 0
+.ret19:	.restore sp,0
 	adds sp=16,sp
 	;;
 	ld8 r9=[sp]				// load new ar.unat