drm: of: simplify component probe code

Use positive logic for better readability. This also eliminates one
of_node_put() call, making the code shorter.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Archit Taneja <archit@cradlewise.com>
Link: https://patchwork.freedesktop.org/patch/msgid/61c56895d44117d80e7d82f04e729e29c60fadbd.1519327370.git.baruch@tkos.co.il

drivers/gpu/drm/drm_of.c

@@ -122,12 +122,10 @@ int drm_of_component_probe(struct device *dev,
 		if (!port)
 			break;
 
-		if (!of_device_is_available(port->parent)) {
-			of_node_put(port);
-			continue;
-		}
+		if (of_device_is_available(port->parent))
+			drm_of_component_match_add(dev, &match, compare_of,
+						   port);
 
-		drm_of_component_match_add(dev, &match, compare_of, port);
 		of_node_put(port);
 	}