[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/sibyte/swarm/setup.c b/arch/mips/sibyte/swarm/setup.c
index 2996e33..ac342f5 100644
--- a/arch/mips/sibyte/swarm/setup.c
+++ b/arch/mips/sibyte/swarm/setup.c
@@ -77,7 +77,7 @@
 #endif
 }
 
-void __init swarm_timer_setup(struct irqaction *irq)
+void __init plat_timer_setup(struct irqaction *irq)
 {
         /*
          * we don't set up irqaction, because we will deliver timer
@@ -117,7 +117,6 @@
 	panic_timeout = 5;  /* For debug.  */
 
 	board_time_init = swarm_time_init;
-	board_timer_setup = swarm_timer_setup;
 	board_be_handler = swarm_be_handler;
 
 	if (xicor_probe()) {