disp: msm: sde: Increase LUTDMA address max to 21 bits
LUTDMA addressing was previously restricted to 20 bits. Update
the LUTDMA validation logic to allow the full 21 bit addressing.
Change-Id: If0bce4f490eb871101f2b3227883aba5149ad27a
Signed-off-by: Christopher Braga <[email protected]>