stm32mon: add STM32H7 identifier
stm32mon: add STM32H7 identifier

Add a new chip ID to support the STM32H7x3 parts.

Signed-off-by: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>

BRANCH=none
BUG=b:67081508
TEST=flash_ec --board=meowth_fp

Change-Id: I3897a74f5414e0e6b13890291706134c2d916af9
Reviewed-on: https://chromium-review.googlesource.com/856977
Commit-Ready: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>
Tested-by: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>
Reviewed-by: Gwendal Grignou <190c5a5edfcf62e0246559bf31fa7548674de3ad@chromium.org>

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