drm/bridge: tc358767: Do not cache dsi_lanes twice

The DSI lane count can be accessed via the dsi device pointer,
make use of that. No functional change.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220624181902.151959-1-marex@denx.de

Author: Marek Vasut

drivers/gpu/drm/bridge/tc358767.c

@@ -288,7 +288,6 @@ struct tc_data {
 	struct drm_connector	connector;
 
 	struct mipi_dsi_device	*dsi;
-	u8			dsi_lanes;
 
 	/* link settings */
 	struct tc_edp_link	link;
@@ -1261,7 +1260,7 @@ static int tc_dsi_rx_enable(struct tc_data *tc)
 	regmap_write(tc->regmap, PPI_TX_RX_TA, TTA_GET | TTA_SURE);
 	regmap_write(tc->regmap, PPI_LPTXTIMECNT, LPX_PERIOD);
 
-	value = ((LANEENABLE_L0EN << tc->dsi_lanes) - LANEENABLE_L0EN) |
+	value = ((LANEENABLE_L0EN << tc->dsi->lanes) - LANEENABLE_L0EN) |
 		LANEENABLE_CLEN;
 	regmap_write(tc->regmap, PPI_LANEENABLE, value);
 	regmap_write(tc->regmap, DSI_LANEENABLE, value);
@@ -1909,8 +1908,7 @@ static int tc_mipi_dsi_host_attach(struct tc_data *tc)
 
 	tc->dsi = dsi;
 
-	tc->dsi_lanes = dsi_lanes;
-	dsi->lanes = tc->dsi_lanes;
+	dsi->lanes = dsi_lanes;
 	dsi->format = MIPI_DSI_FMT_RGB888;
 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE;