pwm: brcmstb: Checked clk_prepare_enable() return value

Check the clk_prepare_enable() return value and propagate it.
Suggested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-brcmstb.c

@@ -273,9 +273,7 @@ static int brcmstb_pwm_resume(struct device *dev)
 {
 	struct brcmstb_pwm *p = dev_get_drvdata(dev);
 
-	clk_prepare_enable(p->clk);
-
-	return 0;
+	return clk_prepare_enable(p->clk);
 }
 #endif