ARM: OMAP3: cpuidle - set global variables static

struct powerdomain varialbes are all file local, make them static.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NJean Pihet <j-pihet@ti.com>
Reviewed-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: NKevin Hilman <khilman@ti.com>
[khilman@ti.com: update changelog, drop error check in fast path]
Signed-off-by: NKevin Hilman <khilman@ti.com>

arch/arm/mach-omap2/cpuidle34xx.c

@@ -75,7 +75,7 @@ static struct omap3_idle_statedata omap3_idle_data[] = {
 	},
 };
 
-struct powerdomain *mpu_pd, *core_pd, *per_pd, *cam_pd;
+static struct powerdomain *mpu_pd, *core_pd, *per_pd, *cam_pd;
 
 static int _cpuidle_allow_idle(struct powerdomain *pwrdm,
 				struct clockdomain *clkdm)