dcmihandler: Add DCMI Power management support check

According to section 6.6 Power management of DCMI specification,
if power management feature is disabled,
the related commands (Get/Set/Activate/Deactive Power Limit)
should be unsupported.

Change-Id: I887f33babb2fe7a1ab97bb2d0720a693171e48a1
Signed-off-by: Kirill Pakhomov <k.pakhomov@yadro.com>
2 files changed