brya: Reset SLP VW signals on EC-AP eSPI reset
brya: Reset SLP VW signals on EC-AP eSPI reset

This enables an option for the NPCX eSPI support code to reset SLP
signals when eSPI# is asserted because of a global reset.  This is
needed exclusively on platforms that do not use deep Sx.

The EC console apshutdown command forces the AP into G3 but the SLP_S4
signal is not reset in this case as virtual wire signals are not reset
on ungraceful AP shutdown (global reset).

BRANCH=none
BUG=b:179977907
TEST=With the config defined, used EC "powerinfo" command to observe the
	SLP_S4 virtual wire is now reset after "apshutdown" command.

Change-Id: I828f8c69657c4884629d0ca07f0ac1662aff57f0
Signed-off-by: Caveh Jalali <08e24a66aefda7a55ca7d73f8903e0fb16eec763@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2771141
Reviewed-by: Furquan Shaikh <6be5c96c464778f89679b1062a2e0a6af93d2aa5@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec