microblaze: Use standard interrupt_init() function

Do not use microblaze specific interrupt init function.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/microblaze/cpu/interrupts.c b/arch/microblaze/cpu/interrupts.c
index f66ec69..b6d6610 100644
--- a/arch/microblaze/cpu/interrupts.c
+++ b/arch/microblaze/cpu/interrupts.c
@@ -109,7 +109,7 @@
 	      intc->iar, intc->mer);
 }
 
-int interrupts_init(void)
+int interrupt_init(void)
 {
 	int i;