ARM: OMAP2+: voltage: fixup oscillator handling when CONFIG_PM=n

commit 908b75e8 (ARM: OMAP: add support for oscillator setup) added a new
API for oscillator setup, but is broken when CONFIG_PM=n.

The new functions have dummy definitions when CONFIG_PM=n, but also have
full implementations available, which conflict.

To fix, wrap the PM implmentations in #ifdef CONFIG_PM.

Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/pm.c

@@ -39,6 +39,7 @@ static struct omap_device_pm_latency *pm_lats;
  */
 int (*omap_pm_suspend)(void);
 
+#ifdef CONFIG_PM
 /**
  * struct omap2_oscillator - Describe the board main oscillator latencies
  * @startup_time: oscillator startup latency
@@ -68,6 +69,7 @@ void omap_pm_get_oscillator(u32 *tstart, u32 *tshut)
 	*tstart = oscillator.startup_time;
 	*tshut = oscillator.shutdown_time;
 }
+#endif
 
 static int __init _init_omap_device(char *name)
 {