powerpc: Rework interrupt_init_cpu()

The function interrupt_init_cpu() is given an int return type but does
not return anything but 0.  Rework this to be a void function.

Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Mario Six <mario.six@gdsys.cc>
diff --git a/arch/powerpc/cpu/mpc85xx/interrupts.c b/arch/powerpc/cpu/mpc85xx/interrupts.c
index cf730c5..b925490 100644
--- a/arch/powerpc/cpu/mpc85xx/interrupts.c
+++ b/arch/powerpc/cpu/mpc85xx/interrupts.c
@@ -20,7 +20,7 @@
 #include <post.h>
 #endif
 
-int interrupt_init_cpu(unsigned *decrementer_count)
+void interrupt_init_cpu(unsigned *decrementer_count)
 {
 	ccsr_pic_t __iomem *pic = (void *)CONFIG_SYS_MPC8xxx_PIC_ADDR;
 
@@ -77,8 +77,6 @@
 #ifdef CONFIG_POST
 	post_word_store(post_word);
 #endif
-
-	return (0);
 }
 
 /* Install and free a interrupt handler. Not implemented yet. */