Clear hibernate data when enabling hibernate module clock
Clear hibernate data when enabling hibernate module clock

This ensures it comes up in a known-good state.

BUG=none
TEST=manual

scratchpad write 0x12345
hibernate 1
scratchpad -> still 0x12345
keyboard reset
scratchpad -> still 0x12345
pull power and battery, then plug back in
scratchpad -> now 0

Change-Id: I2c205f53e03eefe915260b9be39c809ea7d69293
Signed-off-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/29500
Reviewed-by: Bill Richardson <129945214b1d548d8e49b6c29c43094f8c78057f@chromium.org>

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