Revert "drm/mediatek: dsi: Fix DSI host and panel bridge pre-enable order"

This reverts commit f5b1819193667bf62c3c99d3921b9429997a14b2.

As the original commit (c9b1150a68d9 ("drm/atomic-helper: Re-order
bridge chain pre-enable and post-disable")) causing the issue has been
reverted, let's revert the fix for mediatek.

Signed-off-by: Tomi Valkeinen <[e-mail]>
Cc: [e-mail] # v6.17+
Fixes: c9b1150a68d9 ("drm/atomic-helper: Re-order bridge chain pre-enable and post-disable")
Reviewed-by: Maxime Ripard <[e-mail]>
Reviewed-by: Linus Walleij <[e-mail]>
Tested-by: Linus Walleij <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

drivers/gpu/drm/mediatek/mtk_dsi.c

···
 			return PTR_ERR(dsi->next_bridge);
 	}
 
-	/*
-	 * set flag to request the DSI host bridge be pre-enabled before device bridge
-	 * in the chain, so the DSI host is ready when the device bridge is pre-enabled
-	 */
-	dsi->next_bridge->pre_enable_prev_first = true;
-
 	drm_bridge_add(&dsi->bridge);
 
 	ret = component_add(host->dev, &mtk_dsi_component_ops);