mec1322: bug fix for hibernation timer
mec1322: bug fix for hibernation timer

When system timer stops while in heavysleep idle task,
hibernation timer maintains system time and system timer's
recovery is done with reading from hibernation timer.
If hibernation timer setting/reading is incorrect, system timer
recovery is incorrect and evenytually this will result in
quicker/more frequent task scheduling and eventually faster
sleep LED blinking at S3 and higher S3 power consumption.

BRANCH=firmware-strago-7287.B
BUG=chrome-os-partner:37576
TEST=1. measure S3 LED blinking time(probing GPIO pin with scope
     2. For debug purpose, let system timer keeps running and compare
        internval from system timer reading (t1 - t0) and one from
	hibernation timer.

Change-Id: Iace3d29c9e20c0ea863c25eacb69d50858e204b7
Signed-off-by: Kyoung Kim <0fa79f8568f83616b048a28252e7d9ad3c59c80d@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/297753
Reviewed-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>
(cherry picked from commit 86e7e64e3b5d27a80e1fac296776c0e2fb57912d)
Reviewed-on: https://chromium-review.googlesource.com/297796
Commit-Ready: Divya Jyothi <7fa6690d0a542ccce445e16fba24c5f6700e0873@intel.com>
Tested-by: Divya Jyothi <7fa6690d0a542ccce445e16fba24c5f6700e0873@intel.com>

akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec