mb/supermicro/x11ssm-f: correct trigger for SMI/NMI interrupt inputs

All four SMI/NMI interrupt inputs have an external pull-up resistor and
get triggered by pulling the line low. Thus, correct the trigger to
active-low.

Also document the signals by adding appropriate comments.

The pads' connections have been determined by dissecting a dead board.

Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Change-Id: Id1a8c1e0b9fe723a15d04a88d565a53eeba9b085
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48093
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions