msm: mdss: Use the common interface for irq handling for mdp3

mdss provides a common interface for handling the interrupts.
Use this interface for mdp3 and dsi v2.

Change-Id: If9ca804359210211e037311a5de89666653d0a9a
Signed-off-by: Shivaraj Shetty <shivaraj@codeaurora.org>