cr50: Move 30 ms ec_rst delay to after falling edge
cr50: Move 30 ms ec_rst delay to after falling edge

Platfoms with closed EC require at least 30 ms to put the EC in reset.
In order to support flashrom over CCD move this 30 ms delay from before
the deassertion of EC reset to after assertion.

BUG=b:142100741
TEST=Run flashrom over CCD without failures
BRANCH=cr50

Change-Id: Ia8bb207a4407733f3cf77c52ac9063cc7bec3f94
Signed-off-by: Mathew King <5f5c121488ff77c128d954b29ebebffa1909e0f6@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1881752
Reviewed-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>

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