drm/tidss: Drop useless variable init

No need to initialize the ret to 0 in dispc_softreset().
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Aradhya Bhatia <a-bhatia1@ti.com>
Link: https://lore.kernel.org/r/20231109-tidss-probe-v2-3-ac91b5ea35c0@ideasonboard.comSigned-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

drivers/gpu/drm/tidss/tidss_dispc.c

@@ -2764,7 +2764,7 @@ static void dispc_init_errata(struct dispc_device *dispc)
 static void dispc_softreset(struct dispc_device *dispc)
 {
 	u32 val;
-	int ret = 0;
+	int ret;
 
 	/* Soft reset */
 	REG_FLD_MOD(dispc, DSS_SYSCONFIG, 1, 1, 1);