Request to hard-reboot EC should reboot PD as well
Request to hard-reboot EC should reboot PD as well

Software sync on the AP will ask the EC to reboot to RO after the AP
shuts down.  This allows the AP to do a clean shutdown before the EC
reboots.  The PD chip should be rebooted at the same time the EC
reboots itself, so that in a low-battery case the requested PD reboot
also takes place after AP shutdown.

BUG=chrome-os-partner:30079
BRANCH=none
TEST=From the EC console, 'reboot hard' also reboots the PD chip.

Change-Id: I109a495ca32ad1ac4aac42708935962d3226792e
Signed-off-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/210570
Reviewed-by: Alec Berg <1a4429eeda29095a12e19a73405f80f5b7f37a63@chromium.org>

fourier49/BIZ_EC,mtk09422/chromiumos-platform-ec,mtk09422/chromiumos-platform-ec,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,md5555/ec,thehobn/ec,eatbyte/chromium-ec,eatbyte/chromium-ec,coreboot/chrome-ec,eatbyte/chromium-ec,md5555/ec,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,mtk09422/chromiumos-platform-ec,akappy7/ChromeOS_EC_LED_Diagnostics,longsleep/ec,fourier49/BIZ_EC,longsleep/ec,thehobn/ec,md5555/ec,coreboot/chrome-ec,longsleep/ec,fourier49/BIZ_EC,fourier49/BZ_DEV_EC,longsleep/ec,fourier49/BZ_DEV_EC,coreboot/chrome-ec,fourier49/BZ_DEV_EC,md5555/ec,thehobn/ec,thehobn/ec,akappy7/ChromeOS_EC_LED_Diagnostics,fourier49/BIZ_EC,coreboot/chrome-ec,eatbyte/chromium-ec,fourier49/BZ_DEV_EC,mtk09422/chromiumos-platform-ec