TCPMv2: Correct PE_VDM_Response name string
TCPMv2: Correct PE_VDM_Response name string

PE_VDM_RESPONSE isn't a superstate.

BUG=none
TEST=make buildall
BRANCH=none

Signed-off-by: Abe Levkoy <2e1ad7039298f93262cf06bbb457275fb3e2ecb5@chromium.org>
Change-Id: I3450f4eb0d12bd71187932b453bbb7ebeade7f48
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2517780
Reviewed-by: Jett Rink <9d4aef0593e6843318d99df31597fb6153b89787@chromium.org>
Commit-Queue: Jett Rink <9d4aef0593e6843318d99df31597fb6153b89787@chromium.org>

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