msm: camera: icp: Handle Watchdog/subsystem failures

This change provides provision to capture fatal errors
reported by FW and enables WD interrupt from A5. In such cases
FW will be downloaded again before next USECASE starts,
even if power collpase is enabled.

Change-Id: I04aef9a55a7e1312344bdec5221e1c318cf1ef82
Signed-off-by: Alok Pandey <akumarpa@codeaurora.org>
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>