video: ARM CLCD: fix endpoint lookup logic

The addition of the Nomadik support in this driver introduced
a bug in clcdfb_of_init_display(), which now calls init_panel
with an uninitialized 'endpoint' pointer, as "gcc -Wmaybe-uninitialized"
warns:

drivers/video/fbdev/amba-clcd.c: In function 'clcdfb_of_init_display':
drivers/video/fbdev/amba-clcd.c:785:5: error: 'endpoint' may be used uninitialized in this function [-Werror=maybe-uninitialized]

This reverts the broken part of the function to what it was before
the patch, which is the best guess I have to what it should be.
I assume this was left over from an attempted rework of the
code that was partially backed out.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 046ad6cdeb ("video: ARM CLCD: support Nomadik variant")
Cc: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/fbdev/amba-clcd.c

@@ -782,12 +782,9 @@ static int clcdfb_of_init_display(struct clcd_fb *fb)
 	/*
 	 * Fetch the panel endpoint.
 	 */
-	if (!endpoint) {
-		endpoint = of_graph_get_next_endpoint(fb->dev->dev.of_node,
-						      NULL);
-		if (!endpoint)
-			return -ENODEV;
-	}
+	endpoint = of_graph_get_next_endpoint(fb->dev->dev.of_node, NULL);
+	if (!endpoint)
+		return -ENODEV;
 
 	if (fb->vendor->init_panel) {
 		err = fb->vendor->init_panel(fb, endpoint);