msm: mdss: dp: hdcp 2.2: add support for interrupt handling

Enable the interrupts required by hdcp 2.2 to update the hdcp 2.2
state machine as per hardware status.

Change-Id: Ib551b1fe8641203b66a31e745d5091641b4d0ae2
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>