drm/managed: Simplify if condition

The if condition !A || A && B can be simplified to !A || B.

Fixes the following Coccinelle/coccicheck warning reported by
excluded_middle.cocci:

WARNING !A || A && B is equivalent to !A || B

Compile-tested only.

Acked-by: Thomas Zimmermann <[e-mail]>
Signed-off-by: Thorsten Blum <[e-mail]>
Reviewed-by: Dmitry Baryshkov <[e-mail]>
Signed-off-by: Thomas Zimmermann <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/drm_managed.c

···
 	spin_lock_irqsave(&dev->managed.lock, flags);
 	list_for_each_entry_reverse(dr, &dev->managed.resources, node.entry) {
 		if (dr->node.release == action) {
-			if (!data || (data && *(void **)dr->data == data)) {
+			if (!data || *(void **)dr->data == data) {
 				dr_match = dr;
 				del_dr(dev, dr_match);
 				break;