feat(plat/mdeiatek/mt8195): add display port control in SiP service

MTK display port mute/unmute control registers need to be
set in secure world.

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Change-Id: Iec73650e937bd20e25c18fa28d55ae29e68b10d3
7 files changed