cpuidle: use drv instead of cpuidle_driver in show_current_driver()

Instances of "struct cpuidle_driver *" are consistently named as "drv"
in the cpuidle core except in show_current_driver().

Make that function use variable naming consistent with the rest of the
code.

[rjw: Changelog]
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
index a022393..e918b6d 100644
--- a/drivers/cpuidle/sysfs.c
+++ b/drivers/cpuidle/sysfs.c
@@ -52,12 +52,12 @@
 				   char *buf)
 {
 	ssize_t ret;
-	struct cpuidle_driver *cpuidle_driver;
+	struct cpuidle_driver *drv;
 
 	spin_lock(&cpuidle_driver_lock);
-	cpuidle_driver = cpuidle_get_driver();
-	if (cpuidle_driver)
-		ret = sprintf(buf, "%s\n", cpuidle_driver->name);
+	drv = cpuidle_get_driver();
+	if (drv)
+		ret = sprintf(buf, "%s\n", drv->name);
 	else
 		ret = sprintf(buf, "none\n");
 	spin_unlock(&cpuidle_driver_lock);