soc/amd/phoenix/Kconfig: Prevent changes to AMD_FWM_POSITION_INDEX

The phoenix SoC does not support multiple EFS locations. Set the default
to the only valid value and prevent mainboard overrides by making the
option non-user-configurable.

TEST=build birman-phoenix

Signed-off-by: Fred Reitberger <reitbergerfred@gmail.com>
Change-Id: I0f720dbadf2d28a3c39daa4bd653a407be4893d0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74249
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>

0 files changed, 0 insertions, 0 deletions