PM / devfreq: tegra: remove unneeded variable

This variable is not used after initialization, so
remove it. And in order to unify the code style,
move the location where the dev_get_drvdata is called
by the way.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

drivers/devfreq/tegra-devfreq.c

@@ -573,10 +573,7 @@ static int tegra_governor_get_target(struct devfreq *devfreq,
 static int tegra_governor_event_handler(struct devfreq *devfreq,
 					unsigned int event, void *data)
 {
-	struct tegra_devfreq *tegra;
-	int ret = 0;
-
-	tegra = dev_get_drvdata(devfreq->dev.parent);
+	struct tegra_devfreq *tegra = dev_get_drvdata(devfreq->dev.parent);
 
 	switch (event) {
 	case DEVFREQ_GOV_START:
@@ -600,7 +597,7 @@ static int tegra_governor_event_handler(struct devfreq *devfreq,
 		break;
 	}
 
-	return ret;
+	return 0;
 }
 
 static struct devfreq_governor tegra_devfreq_governor = {