ANDROID: arm64: dts: qcom: sdm845-db845c: Bring in LT9611

Enable MDSS and DSI and add the LT9611 HDMI bridge. DSI1 is supposedly
needed for 4k support, but is left commented out as this is yet to be
functional.

Add LT9611 DSI to HDMI bridge driver, as well as the
i2s initialization logic.

Bug: 146449535
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: I7bf2b82abeca7274f8e2dc69c592ed8303e3fbc6
Signed-off-by: Matthias Maennich <maennich@google.com>