OMAPDSS: DISPC: fix dispc_mgr_lclk_rate for DIGIT output

dispc_mgr_lclk_rate() cannot currently be called with DIGIT channel
parameter, even if dispc_ovl_lclk_rate() can. Fix this by making
dispc_mgr_lclk_rate() handle DIGIT channel also.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/omap2/dss/dispc.c

@@ -3167,6 +3167,7 @@ unsigned long dispc_mgr_lclk_rate(enum omap_channel channel)
 	unsigned long r;
 	u32 l;
 
+	if (dss_mgr_is_lcd(channel)) {
 		l = dispc_read_reg(DISPC_DIVISORo(channel));
 
 		lcd = FLD_GET(l, 23, 16);
@@ -3189,6 +3190,9 @@ unsigned long dispc_mgr_lclk_rate(enum omap_channel channel)
 		}
 
 		return r / lcd;
+	} else {
+		return dispc_fclk_rate();
+	}
 }
 
 unsigned long dispc_mgr_pclk_rate(enum omap_channel channel)
@@ -3247,12 +3251,9 @@ static unsigned long dispc_plane_lclk_rate(enum omap_plane plane)
 {
 	enum omap_channel channel = dispc_ovl_get_channel_out(plane);
 
-	if (dss_mgr_is_lcd(channel))
 	return dispc_mgr_lclk_rate(channel);
-	else
-		return dispc_fclk_rate();
-
 }
+
 static void dispc_dump_clocks_channel(struct seq_file *s, enum omap_channel channel)
 {
 	int lcd, pcd;