drm/vc4: txp: Remove vc4_dev txp pointer

There's no user for that pointer so let's just get rid of it.
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20220711173939.1132294-50-maxime@cerno.tech

drivers/gpu/drm/vc4/vc4_drv.h

@@ -85,7 +85,6 @@ struct vc4_dev {
 	struct vc4_hvs *hvs;
 	struct vc4_v3d *v3d;
 	struct vc4_vec *vec;
-	struct vc4_txp *txp;
 
 	struct vc4_hang_state *hang_state;
 

drivers/gpu/drm/vc4/vc4_txp.c

@@ -469,7 +469,6 @@ static int vc4_txp_bind(struct device *dev, struct device *master, void *data)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct drm_device *drm = dev_get_drvdata(master);
-	struct vc4_dev *vc4 = to_vc4_dev(drm);
 	struct vc4_crtc *vc4_crtc;
 	struct vc4_txp *txp;
 	struct drm_crtc *crtc;
@@ -523,7 +522,6 @@ static int vc4_txp_bind(struct device *dev, struct device *master, void *data)
 		return ret;
 
 	dev_set_drvdata(dev, txp);
-	vc4->txp = txp;
 
 	vc4_debugfs_add_regset32(drm, "txp_regs", &txp->regset);
 
@@ -533,13 +531,9 @@ static int vc4_txp_bind(struct device *dev, struct device *master, void *data)
 static void vc4_txp_unbind(struct device *dev, struct device *master,
 			   void *data)
 {
-	struct drm_device *drm = dev_get_drvdata(master);
-	struct vc4_dev *vc4 = to_vc4_dev(drm);
 	struct vc4_txp *txp = dev_get_drvdata(dev);
 
 	vc4_txp_connector_destroy(&txp->connector.base);
-
-	vc4->txp = NULL;
 }
 
 static const struct component_ops vc4_txp_ops = {