Fix dev time initialization for cache age caculation

dev->bid_time was initialized to INT_MIN causing an
overflow in cache age calculation, which in turn
caused a new device structure to not be filled with
data due to assumed up-to-date values.

Change-Id: I232e0a57d52777cf0ae6f5f7d01cbf8601a9011f
Merge remote-tracking branch 'origin/cm-10.1' into cm-10.1-linaro