backend/drm: fetch EDID manufacturer from udev_hwdb

Maintaining our internal table up-to-date is tedious: one needs to
manually go through the PnP ID registry [1] and check whether we're
missing any entry.

udev_hwdb already has an API to fetch a manufacturer name from its
PnP ID. Use that instead.

[1]: https://uefi.org/pnp_id_list

backend/drm/drm.c

@@ -1314,7 +1314,7 @@ void scan_drm_connectors(struct wlr_drm_backend *drm,
 			size_t edid_len = 0;
 			uint8_t *edid = get_drm_prop_blob(drm->fd,
 				wlr_conn->id, wlr_conn->props.edid, &edid_len);
-			parse_edid(&wlr_conn->output, edid_len, edid);
+			parse_edid(wlr_conn, edid_len, edid);
 			free(edid);
 
 			char *subconnector = NULL;