msm: camera: fast boot camera aDSP shared memory driver

aDSP shared memory driver (adsp-shmem) takes care
to organize access to the shared memory region for
fast boot camera use case.

Change-Id: I16fe0ed026d22cba97b959a097b76f570dbc5a2d
Signed-off-by: Milen Mitkov <mmitkov@codeaurora.org>
Signed-off-by: Evgeniy Borisov <gencho@codeaurora.org>