sh: Configurable timer IRQ.

All of the various CPU subtypes currently hardcode TIMER_IRQ,
switch this to a config option in the few places we need this.

This allows further removal of hardcoded IRQ headers..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/kernel/timers/timer-cmt.c

@@ -169,7 +169,7 @@ static int cmt_timer_init(void)
 
 	cmt_clock_enable();
 
-	setup_irq(TIMER_IRQ, &cmt_irq);
+	setup_irq(CONFIG_SH_TIMER_IRQ, &cmt_irq);
 
 	cmt0_clk.parent = clk_get("module_clk");