soc/amd/phoenix/chip.h: guard FSP-specific data structures

Since the USB configuration data structure is FSP-specific, add guards
on this part of the soc_amd_phoenix_config struct and the corresponding
include.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I6c324421fbc3dc7b9a7bf6f5868785e9718147a5
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80298
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions