Revert "PM / Sleep: Add wake lock api wrapper on top of wakeup sources"

This reverts commit 3482eeaa ("PM / Sleep: Add wake lock api
wrapper on top of wakeup sources") and also commit a12d5bf2
("power: Remove HAS_WAKELOCK config and document WAKELOCK") as
both of these commits aren't present in the android common kernel
anymore. They seem to have come in through some other tree that
we had before android-common-4.9 existed.

Change-Id: I1fb98a391f5ff194383fd919ef3fa71dfca39d0b
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>