mb/google/volteer/variants/eldrid: Configure GPP_S4 and GPP_S5
GPP_S4 and GPP_S5 use as DMIC pins that need to be defined as NF2
BUG=b:
168564129
Signed-off-by: nick_xr_chen <nick_xr_chen@wistron.corp-partner.google.com>
Change-Id: Ia1fca960ac85f253882f0aa68b370eed49ac67b7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45689
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sathyanarayana Nujella <sathyanarayana.nujella@intel.com>
Reviewed-by: Ravishankar Sarawadi <ravishankar.sarawadi@intel.com>