mb/google/brya/variants/felwinter: Add fw_config to control TBT PCIe RP0
Use USB4 fw_config to enable TBT PCIe RP0.
BUG=b:
237619214, b:
237623610
TEST=emerge-brya coreboot chromeos-bootimage
Signed-off-by: John Su <john_su@compal.corp-partner.google.com>
Change-Id: Ie3e51a0f30e0c9d20127c017436813d4ede95639
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65696
Reviewed-by: Frank Wu <frank_wu@compal.corp-partner.google.com>
Reviewed-by: Dtrain Hsu <dtrain_hsu@compal.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>