types/wlr_tablet_tool: remove name ambiguity

It wasn't clear in the backend whether to use name or base.name, change
it so base.name has to be used.

Fixes https://github.com/swaywm/sway/issues/6884

backend/wayland/tablet_v2.c

@@ -836,8 +836,8 @@ static void handle_tablet_name(void *data, struct zwp_tablet_v2 *zwp_tablet_v2,
 	struct wlr_wl_input_device *dev = data;
 	struct wlr_tablet *tablet = dev->wlr_input_device.tablet;
 
-	free(tablet->name);
+	free(tablet->base.name);
-	tablet->name = strdup(name);
+	tablet->base.name = strdup(name);
 }
 
 static void handle_tablet_id(void *data, struct zwp_tablet_v2 *zwp_tablet_v2,

include/wlr/types/wlr_tablet_tool.h

@@ -71,7 +71,6 @@ struct wlr_tablet {
 		struct wl_signal button;
 	} events;
 
-	char *name;
 	struct wl_array paths; // char *
 
 	void *data;

types/tablet_v2/wlr_tablet_v2_tablet.c

@@ -108,9 +108,9 @@ void add_tablet_client(struct wlr_tablet_seat_client_v2 *seat,
 	zwp_tablet_seat_v2_send_tablet_added(seat->resource, client->resource);
 
 	// Send the expected events
-	if (tablet->wlr_tablet->name) {
+	if (tablet->wlr_tablet->base.name) {
 		zwp_tablet_v2_send_name(client->resource,
-			tablet->wlr_tablet->name);
+			tablet->wlr_tablet->base.name);
 	}
 	zwp_tablet_v2_send_id(client->resource,
 		tablet->wlr_device->vendor, tablet->wlr_device->product);