nissa: enable PROCHOT monitoring
nissa: enable PROCHOT monitoring

The EC_PROCHOT_ODL signal was connected to the
throttle_ap_prochot_input_interrupt, but the interrupt was never
enabled.

Configure the PROCHOT input and enable the interrupt, which will log to
the EC console when PROCHOT is detected. If the board provides fans,
then the fans are also enabled during PROCHOT conditions.

BUG=b:230783041
BRANCH=none
TEST=zmake testall

Signed-off-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>
Change-Id: I686a684e86d3c9897e7c980e41c3d4a2995e0ccc
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3615481
Reviewed-by: Andrew McRae <44ad1424cfc8411c96d9181798ca41ae55709dfb@google.com>
Reviewed-by: Peter Marheine <ef0b2c492edde94778d7465bfbaeed52c5be6858@chromium.org>

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