drm/tilcdc: rename req_rate to pclk_rate

The req_rate name is a little misleading, so let's rename to pclk_rate
(pixel clock rate).
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Jyri Sarha <jyri.sarha@iki.fi>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Jyri Sarha <jyri.sarha@iki.fi>
Link: https://patchwork.freedesktop.org/patch/msgid/20210322213337.26667-2-dariobin@libero.it

drivers/gpu/drm/tilcdc/tilcdc_crtc.c

@@ -203,18 +203,18 @@ static void tilcdc_crtc_set_clk(struct drm_crtc *crtc)
 	struct drm_device *dev = crtc->dev;
 	struct tilcdc_drm_private *priv = dev->dev_private;
 	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
-	unsigned long clk_rate, real_rate, req_rate;
+	unsigned long clk_rate, real_rate, pclk_rate;
 	unsigned int clkdiv;
 	int ret;
 
 	clkdiv = 2; /* first try using a standard divider of 2 */
 
 	/* mode.clock is in KHz, set_rate wants parameter in Hz */
-	req_rate = crtc->mode.clock * 1000;
+	pclk_rate = crtc->mode.clock * 1000;
 
-	ret = clk_set_rate(priv->clk, req_rate * clkdiv);
+	ret = clk_set_rate(priv->clk, pclk_rate * clkdiv);
 	clk_rate = clk_get_rate(priv->clk);
-	if (ret < 0 || tilcdc_pclk_diff(req_rate, clk_rate) > 5) {
+	if (ret < 0 || tilcdc_pclk_diff(pclk_rate, clk_rate) > 5) {
 		/*
 		 * If we fail to set the clock rate (some architectures don't
 		 * use the common clock framework yet and may not implement
@@ -229,7 +229,7 @@ static void tilcdc_crtc_set_clk(struct drm_crtc *crtc)
 			return;
 		}
 
-		clkdiv = DIV_ROUND_CLOSEST(clk_rate, req_rate);
+		clkdiv = DIV_ROUND_CLOSEST(clk_rate, pclk_rate);
 
 		/*
 		 * Emit a warning if the real clock rate resulting from the
@@ -238,7 +238,7 @@ static void tilcdc_crtc_set_clk(struct drm_crtc *crtc)
 		 * 5% is an arbitrary value - LCDs are usually quite tolerant
 		 * about pixel clock rates.
 		 */
-		real_rate = clkdiv * req_rate;
+		real_rate = clkdiv * pclk_rate;
 
 		if (tilcdc_pclk_diff(clk_rate, real_rate) > 5) {
 			dev_warn(dev->dev,