soc/amd/stoneyridge: Use uint8_t as type for SPD address

SPD address is currenty int. It should be uint8_t.

BUG=b:62200225

Change-Id: Ia11c5994c41849ba01ecae3cee6fa97c527134d0
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/22300
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
3 files changed