[ALPS05455880] DISP: mt6779: fix frame config sec issue

if frame config params are not right, should not kfree dirty_roi_addr
just kfree the cfg directly and return

MTK-Commit-Id: fa585b9ff557ebda09922565ab8feb32743d36b1

Change-Id: I41cee87cdd4062edfd68e4eb8896fc1d51c9ab2b
Signed-off-by: Guangming Cao <Guangming.Cao@mediatek.com>
CR-Id: ALPS05455880
Feature: [Module]Display Driver