sdm: unset ACTIVE crtc prop for HWTVDRM

PowerOff API should be unsetting crtc ACTIVE for proper bridge teardown.
Unlike HWDeviceDRM, LP property does not apply to External and need not
be set

Change-Id: Id4a6d9cb057a26f3e19a0e8d29452dee4e586fd4
CRs-Fixed: 2277100
23 files changed