drm/msm/sde: use plane address space for inline mapping

Use the SDE plane state's address space for the inline
rotation buffer mapping and unmapping as well. This fixes
an issue with the inline rotation address space setting
not being initialized when splitting the rotation across
multiple planes.

CRs-Fixed: 2074648
Change-Id: I3ea37e3bdbc616c037bf8dccc0f9c2105d075da8
Signed-off-by: Clarence Ip <cip@codeaurora.org>