TCPMv2: Correct state control flow description
TCPMv2: Correct state control flow description

Child run functions execute before parent fun functions, not after. Make
additional minor corrections and clarifications.

BUG=none
TEST=make buildall
BRANCH=none

Signed-off-by: Abe Levkoy <2e1ad7039298f93262cf06bbb457275fb3e2ecb5@chromium.org>
Change-Id: Ic1b345e42269c9086f77bb6d9fe54d3f91b1002e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2277210
Reviewed-by: Jett Rink <9d4aef0593e6843318d99df31597fb6153b89787@chromium.org>

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