omap4-common: fix the power-key

Add handling of a missing powerkey-state when the phone is in
deep sleep which could result in the key-press to be partially
ignored. Additionally increase wakelock-timeouts for the powerkey-
wakelock.

Change-Id: Ibccfdbc866610f067cbb563cf7fc9ecf7a7e9a03
Merge branch 'cm-11.0' into kk_mkt