CHROMIUM: ipu3-imgu: Add support for system suspend/resume

Previously, suspend/resume support was not implemented.
Now, add support for system suspend/resume callbacks for imgu.

BUG=b:63984332
TEST=Test WF & UF camera functionality on Soraka

Change-Id: I1ffdbd0a06b791ad5ee4d88de66f57cec4d0c04a
Signed-off-by: Tianshu Qiu <tian.shu.qiu@intel.com>
Signed-off-by: Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/646870
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
4 files changed