[IA64] Stop bit for brl instruction

SDM says that brl instruction must be followed by a stop bit.
Fix instance in BRL_COND_FSYS_BUBBLE_DOWN where it isn't.
Signed-off-by: Christian Kandeler <christian.kandeler@hob.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/gate.S

@@ -30,6 +30,7 @@
 	.previous
 #define BRL_COND_FSYS_BUBBLE_DOWN(pr)			\
 [1:](pr)brl.cond.sptk 0;				\
+	;;						\
 	.xdata4 ".data.patch.brl_fsys_bubble_down", 1b-.
 
 GLOBAL_ENTRY(__kernel_syscall_via_break)