soc/amd/picasso: Update UARTs

Add a function to uart.c to ensure the right IOMux settings are
programmed for the console UART.  Update Kconfig to reflect the
new addresses.

Give the user the ability to downclock the UARTs' refclock to
1.8342MHz.

Add the abiltiy to use an APU UART at a legacy I/O address.

Update the AOAC register configuration for the two additional
UARTs.

Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Change-Id: I74579674544f0edd2c0e6c4963270b442668e62f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33767
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

0 files changed, 0 insertions, 0 deletions