AMD: Add common header file for CAR setup

Change-Id: I24b2cbd671ac3a463562d284f06258140a019a37
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/4683
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
superio/winbond/*: Provide common romstage component

Following the reasoning of:
cf7b498 superio/fintek/*: Factor out generic romstage component

Change-Id: I3e889c0305c012e7556a5dd348e7f1e1ba629a9d
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5587
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
mainboard/asrock/e350m1: Avoid including early_serial.c

Use generic winbond romstage serial init symbols instead of model
specific implementation. We do this on a case by case basis as some
boards are ROMCC and so need to #include .c files. This is a step to
migrate non-romcc boards to a more generic superio framework.

Change-Id: I56f6d9ec77cd21a612cbbdb48634543f34a2e72c
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5591
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
superio/winbond/w83627dhg: Convert romstage to generic component

Convert the serial init to the generic romstage component and
corresponding boards using this sio.

Change-Id: I36bcf38c4351130be1ed924ecfe606336d0433f3
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5588
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>