libsuspend: check for NULL autosuspend operations beforehand (cred linaro)

original author: Amit Pundir

Change-Id: Ibb89e5bc53d28599fd0737e7e75ddc5d5afcf2b7
remove entropy gathering from flash storage

ps2: touchup whitespace

Change-Id: I2866687c3894e9b5d6b2edae810b55a474f26854