soc/amd/picasso: Add dummy spinlock for psp_verstage
If CONFIG_CMOS_POST is enabled, psp_verstage breaks because the
spinlock code is missing. Add dummy spinlock code as the spinlocks
aren't needed in the PSP.
TEST=Build with CONFIG_CMOS_POST enabled.
BUG=None
Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: Iea6f31e500e1b26f0b974c6eaa486209b9c81459
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43310
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>