cyan: enable power button to wake up EC from HIB mode
cyan: enable power button to wake up EC from HIB mode

BUG=chrome-os-partner:39082
BRANCH=none
TEST=manual
	Press ALT+H+volume-up to force EC into HIB mode. Then
	pressing power button will wake up EC.

Change-Id: Ie662c8c2c719e75a71b03ef8431752d7961f8237
Signed-off-by: li feng <0fd15d95d647a38d004d7ac9a3d0587bb1c98551@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/268823
Reviewed-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>
Commit-Queue: Divya Jyothi <7fa6690d0a542ccce445e16fba24c5f6700e0873@intel.com>
Tested-by: Divya Jyothi <7fa6690d0a542ccce445e16fba24c5f6700e0873@intel.com>

fourier49/BZ_DEV_EC,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,fourier49/BIZ_EC,fourier49/BIZ_EC,fourier49/BZ_DEV_EC,md5555/ec,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,fourier49/BIZ_EC,fourier49/BZ_DEV_EC,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,md5555/ec,coreboot/chrome-ec,coreboot/chrome-ec,fourier49/BZ_DEV_EC,md5555/ec,md5555/ec,fourier49/BIZ_EC,coreboot/chrome-ec,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics