[MIPS] Replace board_timer_setup function pointer by plat_timer_setup.

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

---
diff --git a/arch/mips/dec/setup.c b/arch/mips/dec/setup.c
index 2684f12..d43241c 100644
--- a/arch/mips/dec/setup.c
+++ b/arch/mips/dec/setup.c
@@ -145,13 +145,11 @@
 
 
 extern void dec_time_init(void);
-extern void dec_timer_setup(struct irqaction *);
 
 void __init plat_mem_setup(void)
 {
 	board_be_init = dec_be_init;
 	board_time_init = dec_time_init;
-	board_timer_setup = dec_timer_setup;
 
 	wbflush_setup();
 
diff --git a/arch/mips/dec/time.c b/arch/mips/dec/time.c
index 76e4d09..5729474 100644
--- a/arch/mips/dec/time.c
+++ b/arch/mips/dec/time.c
@@ -186,7 +186,7 @@
 
 EXPORT_SYMBOL(do_settimeofday);
 
-void __init dec_timer_setup(struct irqaction *irq)
+void __init plat_timer_setup(struct irqaction *irq)
 {
 	setup_irq(dec_interrupt[DEC_IRQ_RTC], irq);