Change in coreboot[master]: sb/intel/lynxpoint: Add SerialIO UART console support

[Angel Pons (Code Review)]

Attention is currently required from: Nico Huber, Arthur Heymans, Patrick Rudolph.
Hello build bot (Jenkins), Nico Huber, Patrick Georgi, Arthur Heymans, Patrick Rudolph,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/52489

to look at the new patch set (#10).

Change subject: sb/intel/lynxpoint: Add SerialIO UART console support
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sb/intel/lynxpoint: Add SerialIO UART console support

Derived from Broadwell and adapted to follow what soc/intel does. Note
that SERIALIO_UART_CONSOLE is meant to be selected from the mainboards
which expose a SerialIO UART. UART_FOR_CONSOLE also needs to be set in
mainboard Kconfig accordingly.

Tested on out-of-tree Compal LA-A992P, SerialIO UART 0 can be used to
receive coreboot and SeaBIOS logs.

Change-Id: Ifb3460dd50ed03421a38f03c80f91ae9fd604022
Signed-off-by: Angel Pons 
---
M src/southbridge/intel/lynxpoint/Kconfig
M src/southbridge/intel/lynxpoint/Makefile.inc
M src/southbridge/intel/lynxpoint/bootblock.c
M src/southbridge/intel/lynxpoint/pch.h
M src/southbridge/intel/lynxpoint/serialio.c
A src/southbridge/intel/lynxpoint/uart.c
A src/southbridge/intel/lynxpoint/uart_init.c
7 files changed, 120 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/89/52489/10