[ALPS08733179] DISP: extend dpc safezone across TE pulse

[Description]
extend dpc safezone(after TE) across TE pulse to avoid extra TE

[Test]
VP, suspend resume

MTK-Commit-Id: 826cdfcba890b661dfad87f19e41ce75ac4c1a2d

Signed-off-by: William Yang <william-tw.yang@mediatek.com>
CR-Id: ALPS08733179
Feature: V-Idle
Change-Id: Ie2ed249fcf6ef2d7a51a3d1b6624bde1bc914e4f