MIPS: Remove pointless return statement from empty void functions.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
To: Sergei Shtylyov <sshtylyov@mvista.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2391/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/cpu-probe.c

@@ -71,7 +71,6 @@ void r4k_wait_irqoff(void)
 	local_irq_enable();
 	__asm__(" 	.globl __pastwait	\n"
 		"__pastwait:			\n");
-	return;
 }
 
 /*