msm: camera: SOF freeze mechanism

When sof freeze happens, before notifying hal, backend
now notifys kernel. This helps us in contacting all the
sub devices and printing the required information to
understand why freeze happened.

Change-Id: Ia610f341fc4761a8be89906633d10d4c2a4e9419
Signed-off-by: Aditya Jonnalagadda <ajonnala@codeaurora.org>