Revert "drivers: power: Add watchdog timer to catch drivers which lockup during suspend."

This reverts commit ad86cc8a.

Commit 70fea60d ("PM / Sleep: Detect device suspend/resume lockup...")
added a suspend/resume watchdog timer to catch the lockup. Let's revert the
duplicate one.

Change-Id: Ic72a87432e27844155467817600adc6cf0c2209c
Signed-off-by: Lianwei Wang <lianwei.wang@gmail.com>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>