drm/panel: simple: Initialize bpc in RK101II01D-CT panel descriptor

Initialize bpc while creating panel_desc structure for RK101II01D-CT

Below warning is triggered since bpc is not being initialized

WARNING: CPU: 2 PID: 47 at drivers/gpu/drm/panel/panel-simple.c:614
panel_simple_probe+0x1b0/0x3c8
Signed-off-by: Rahul T R <r-ravikumar@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220210140300.11900-1-r-ravikumar@ti.com

drivers/gpu/drm/panel/panel-simple.c

@@ -3057,6 +3057,7 @@ static const struct drm_display_mode rocktech_rk101ii01d_ct_mode = {
 
 static const struct panel_desc rocktech_rk101ii01d_ct = {
 	.modes = &rocktech_rk101ii01d_ct_mode,
+	.bpc = 8,
 	.num_modes = 1,
 	.size = {
 		.width = 217,