[ALPS08692696] DISP: Fix crtc 3 cmdq timeout when enter/leave AOD

MT6878 cant access HW RG before
crtc enable(switch rg secure mode to normal by TFA).
Secondary display enable encoder 3 before enable CR
force_doze_switch function. Its lead to DSI1 invalid
configure.

Solution:
1. Avoid enable encoder before enable CRTC for MT6878.
2. Add some debug log for crtc_usage status.

MTK-Commit-Id: 619fe7767978864146a6c98ee541b5dbf952f0fe

Signed-off-by: mtk12211 <shang.zhou@mediatek.com>
CR-Id: ALPS08692696
Feature: display_mobile
Change-Id: I4db5b70f1336a5adaff12c9c47dd6098bd48b4ab