drm/arm: hdlcd: Use CMA helper for plane buffer address calculation

CMA has gained a recent helper function for calculating the start
of the plane buffer's physical address. Use that instead of the
hand rolled version.

Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
This commit is contained in:
Liviu Dudau 2017-06-13 12:18:03 +01:00
commit 49a58f26af