[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/cobalt/setup.c b/arch/mips/cobalt/setup.c
index c997145..c01a017 100644
--- a/arch/mips/cobalt/setup.c
+++ b/arch/mips/cobalt/setup.c
@@ -49,7 +49,7 @@
 	return "MIPS Cobalt";
 }
 
-static void __init cobalt_timer_setup(struct irqaction *irq)
+void __init plat_timer_setup(struct irqaction *irq)
 {
 	/* Load timer value for 1KHz (TCLK is 50MHz) */
 	GALILEO_OUTL(50*1000*1000 / 1000, GT_TC0_OFS);
@@ -129,8 +129,6 @@
 	_machine_halt = cobalt_machine_halt;
 	pm_power_off = cobalt_machine_power_off;
 
-	board_timer_setup = cobalt_timer_setup;
-
         set_io_port_base(CKSEG1ADDR(GT64111_IO_BASE));
 
 	/* I/O port resource must include UART and LCD/buttons */