video: fbdev: sh_mobile_lcdcfb: Remove redundant null check before...

video: fbdev: sh_mobile_lcdcfb: Remove redundant null check before clk_prepare_enable/clk_disable_unprepare

Because clk_prepare_enable() and clk_disable_unprepare() already checked
NULL clock parameter, so the additional checks are unnecessary, just
remove them.
Signed-off-by: NXu Wang <vulab@iscas.ac.cn>
Signed-off-by: NThomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201014085722.26069-1-vulab@iscas.ac.cn

drivers/video/fbdev/sh_mobile_lcdcfb.c

@@ -341,8 +341,7 @@ static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 {
 	if (atomic_inc_and_test(&priv->hw_usecnt)) {
-		if (priv->dot_clk)
-			clk_prepare_enable(priv->dot_clk);
+		clk_prepare_enable(priv->dot_clk);
 		pm_runtime_get_sync(priv->dev);
 	}
 }
@@ -351,8 +350,7 @@ static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 {
 	if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
 		pm_runtime_put(priv->dev);
-		if (priv->dot_clk)
-			clk_disable_unprepare(priv->dot_clk);
+		clk_disable_unprepare(priv->dot_clk);
 	}
 }