[ARM SMP] Add missing SMP timer handling for realview

Until we have local timer support, we need to broadcast the
timer interrupt to the other CPUs.  Also, add the missing
smp_send_timer() prototype to asm/smp.h

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-realview/core.c

@@ -550,6 +550,11 @@ static irqreturn_t realview_timer_interrupt(int irq, void *dev_id, struct pt_reg
 
 	timer_tick(regs);
 
+#ifdef CONFIG_SMP
+	smp_send_timer();
+	update_process_times(user_mode(regs));
+#endif
+
 	write_sequnlock(&xtime_lock);
 
 	return IRQ_HANDLED;