soc/amd/phoenix: make openSIL stub optional

Convert the 'select SOC_AMD_OPENSIL_STUB' statement to a config option
and give it a prompt.  This allows for internal development of openSIL
and corresponding coreboot source, and controllable using a defconfig.

Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Change-Id: I2b48e2bbf71cd94ac7ecec13834ba36aa6c241ce
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81188
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Reviewed-by: Varshit Pandya <pandyavarshit@gmail.com>
Reviewed-by: Martin L Roth <gaumless@gmail.com>

0 files changed, 0 insertions, 0 deletions