omap1: pm_bus: Fix compilation warning

Fix following compilation warning:
arch/arm/mach-omap1/pm_bus.c: In function 'omap1_pm_runtime_resume':
arch/arm/mach-omap1/pm_bus.c:51: warning: unused variable 'ret'
Signed-off-by: Marek Belisko <marek.belisko@open-nandra.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap1/pm_bus.c

@@ -48,7 +48,6 @@ static int omap1_pm_runtime_suspend(struct device *dev)
 
 static int omap1_pm_runtime_resume(struct device *dev)
 {
-	int ret = 0;
 	struct clk *iclk, *fclk;
 
 	dev_dbg(dev, "%s\n", __func__);