oak: ensure PMIC power button is released after SYSJUMP.
oak: ensure PMIC power button is released after SYSJUMP.

There is a race condition between SYSJUMP and function
release_pmic_pwron_deferred().
Process of EC SW Sync will delay the execution time of
release_pmic_pwron_deferred(). PMIC will shutdown the power, if
PMIC power button can not be released within 8 seconds (depends
on PMIC spec). In order to ensure PMIC power button will be
released in time, just release it after SYSJUMP.

BUG=chrome-os-partner:46392
BUG=chrome-os-partner:46656
BRANCH=none
TEST=make buildall -j;
Enable EC SW sync and normal mode in coreboot,
Kernel should bootup successfully.

Change-Id: I45d4aa0f0d4280e68282ea11ccfda05201f88aae
Signed-off-by: Ben Lok <310171a828df105188e0b545d65d6370e8133283@mediatek.com>
Reviewed-on: https://chromium-review.googlesource.com/307220
Reviewed-by: Rong Chang <3a05493f7adfb36d203f663b3bc2ba30e9d6284f@chromium.org>

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