nucleo-h743zi: Add LEDs
nucleo-h743zi: Add LEDs

BRANCH=none
BUG=none
TEST=make BOARD=nucleo-h743zi
     # Flash board
     # From the EC UART console:
     gpioget
     gpioset LED1 1
     gpioset LED2 1
     gpioset LED3 1
     gpioset LED1 0
     gpioset LED2 0
     gpioset LED3 0

Change-Id: I7bf8027e966f7a5d64b66ddc16914e822dfb0a0c
Signed-off-by: Craig Hesling <383db090fd8ef907a606ac8a9eccd2962bc489cf@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1970118
Reviewed-by: Jett Rink <9d4aef0593e6843318d99df31597fb6153b89787@chromium.org>
Reviewed-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>

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