[MIPS] Make do_signal return void.
    
It's return value is ignored everywhere.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

---
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index 86a14d7..c974cc9 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -410,7 +410,7 @@
 	return ret;
 }
 
-int do_signal(struct pt_regs *regs)
+void do_signal(struct pt_regs *regs)
 {
 	struct k_sigaction ka;
 	sigset_t *oldset;
@@ -423,7 +423,7 @@
 	 * if so.
 	 */
 	if (!user_mode(regs))
-		return 1;
+		return;
 
 	if (try_to_freeze())
 		goto no_signal;
@@ -477,8 +477,6 @@
 		clear_thread_flag(TIF_RESTORE_SIGMASK);
 		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
 	}
-
-	return 0;
 }
 
 /*