hwc: 8994: Disable BWC when HDMI intf is active

Due to h/w limitations hwc cannot use bwc when video-mode panels are
active in system. Disable bwc when HDMI intf is active.

For video-mode primary the driver disables the feature via
capabilities node.

Change-Id: I5b101dffe443a8ca2a508c6ca1b0966006bbe284
1 file changed