video: squash lines for immediate return

For vidconsole_post_probe(), it is common coding style to let a
probe method return the value of a register function.

The others will become simple wrapper functions.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
diff --git a/drivers/video/tegra124/display.c b/drivers/video/tegra124/display.c
index 2f1f0df..d8999c3 100644
--- a/drivers/video/tegra124/display.c
+++ b/drivers/video/tegra124/display.c
@@ -326,13 +326,7 @@
 					   int *panel_bppp,
 					   struct display_timing *timing)
 {
-	int ret;
-
-	ret = display_read_timing(dp_dev, timing);
-	if (ret)
-		return ret;
-
-	return 0;
+	return display_read_timing(dp_dev, timing);
 }
 
 static int display_init(struct udevice *dev, void *lcdbase,