render: disable linux-dmabuf without DRM FD

linux-dmabuf used to not need a DRM FD, however since v4 a DRM FD
is required for the main_device event.

render/wlr_renderer.c

@@ -94,13 +94,10 @@ bool wlr_renderer_init_wl_display(struct wlr_renderer *r,
 		return false;
 	}
 
-	if (wlr_renderer_get_dmabuf_texture_formats(r) != NULL) {
-		if (wlr_renderer_get_drm_fd(r) >= 0) {
-			if (wlr_drm_create(wl_display, r) == NULL) {
-				return false;
-			}
-		} else {
-			wlr_log(WLR_INFO, "Cannot get renderer DRM FD, disabling wl_drm");
+	if (wlr_renderer_get_dmabuf_texture_formats(r) != NULL &&
+			wlr_renderer_get_drm_fd(r) >= 0) {
+		if (wlr_drm_create(wl_display, r) == NULL) {
+			return false;
 		}
 
 		if (wlr_linux_dmabuf_v1_create_with_renderer(wl_display, 4, r) == NULL) {