pwm: vt8500: Fix coding style issue

Fixes the following:
WARNING: Prefer pr_warn(... to pr_warning(...
	pr_warning("Waiting for status bits 0x%x to clear timed out\n",

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
diff --git a/drivers/pwm/pwm-vt8500.c b/drivers/pwm/pwm-vt8500.c
index 5480214..ad14389 100644
--- a/drivers/pwm/pwm-vt8500.c
+++ b/drivers/pwm/pwm-vt8500.c
@@ -41,7 +41,7 @@
 		cpu_relax();
 
 	if (unlikely(!loops))
-		pr_warning("Waiting for status bits 0x%x to clear timed out\n",
+		pr_warn("Waiting for status bits 0x%x to clear timed out\n",
 			   bitmask);
 }