msm: vidc: Update video driver ocmem presence documentation

ocmem is not present on all targets. By adding ocmem present
information in device tree, calls to ocmem can only be made for targets
supporting ocmem (msm8974 v1 and v2). For targets with no ocmem support
no ocmem calls are made.

Change-Id: Ic885bf8eccbd15cd09d300c5855d58231d011a97
Signed-off-by: Ashray Kulkarni <ashrayk@codeaurora.org>
1 file changed