[ALPS08769272] mdp:fix mdp bus off timeout

[Description]
When mdp is working, if go to disable
bus, there will be bus timeout.

[Test]
Pass mdp vulscan test.

MTK-Commit-Id: f50efdafdef54880787009908270697daf7e0ff5

Signed-off-by: LiaoHui <ot_hui.liao@mediatek.com>
CR-Id: ALPS08769272
Feature: mdp driver
Change-Id: Ife557381853993e1c58c89cb88eb74f80a0523d6