Don't redeclare ll_local_timer_interrupt.

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

arch/mips/sibyte/sb1250/time.c

@@ -100,7 +100,6 @@ void sb1250_time_init(void)
 
 void sb1250_timer_interrupt(struct pt_regs *regs)
 {
-	extern asmlinkage void ll_local_timer_interrupt(int irq, struct pt_regs *regs);
 	int cpu = smp_processor_id();
 	int irq = K_INT_TIMER_0 + cpu;