soc/amd/picasso/psp_verstage: Implement get_uart_base

The Picasso PSP doesn't support mapping the UART, so add a dummy
function to return NULL.

BUG=b:215599230
TEST=Build and boot morphius

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: Ie1f033ff86ebb0f755a9a0b6ff293aa3c8bbbeb6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61608
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>

0 files changed, 0 insertions, 0 deletions