microblaze: Remove deprecated IRQF_DISABLED

Removed IRQF_DISABLED as it's no-op and should be removed.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index e4b3f33..d7abb71 100644
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -148,7 +148,7 @@
 
 static struct irqaction timer_irqaction = {
 	.handler = timer_interrupt,
-	.flags = IRQF_DISABLED | IRQF_TIMER,
+	.flags = IRQF_TIMER,
 	.name = "timer",
 	.dev_id = &clockevent_xilinx_timer,
 };