SUSPWRDNACK: Active high. Asserted by the PCH on behalf of
the Intel ME when it does not require the PCH Suspend well to be
powered.
Platforms are not expected to use this signal when the PCH’s Deep
S4/S5 feature is used.
This signal is multiplexed with GPIO30 and SUSWARN#.
Active High output signal asserted by the Intel ME to the
Embedded Controller, when it does not require the PCH
Suspend well to be powered.
NOTE: This signal is required by Management Engine in all
platforms.