ARM: OMAP: Fix timer32 oneshot mode

No need to start timer in oneshot mode as pointed out by
Russell King.
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap1/timer32k.c

@@ -131,9 +131,9 @@ static void omap_32k_timer_set_mode(enum clock_event_mode mode,
 
 	switch (mode) {
 	case CLOCK_EVT_MODE_PERIODIC:
-	case CLOCK_EVT_MODE_ONESHOT:
 		omap_32k_timer_start(OMAP_32K_TIMER_TICK_PERIOD);
 		break;
+	case CLOCK_EVT_MODE_ONESHOT:
 	case CLOCK_EVT_MODE_UNUSED:
 	case CLOCK_EVT_MODE_SHUTDOWN:
 		break;