[MIPS] Yosemite: Don't declare titan_mailbox_irq() as asmlinkage.

Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/pmc-sierra/yosemite/smp.c

@@ -106,7 +106,7 @@ void prom_smp_finish(void)
 {
 }
 
-asmlinkage void titan_mailbox_irq(void)
+void titan_mailbox_irq(void)
 {
 	int cpu = smp_processor_id();
 	unsigned long status;