mb/apple/macbookair4_2: Drop unnecessary PCH config

mainboard_pch_lpc_setup() and mainboard_late_rcba_config() did 4
things here on top of the generic PCH code:

 1. Enabling LPC decoding for gameports. It seems unlikely
    that anything is using these ports and there is no code
    to support gameports.

 2. Decoding of COM3 instead of COM2. What COM?

 3. Premature locking of ETR3/global reset. Bad idea.

 4. Disabling the GbE port in BUC. Already done by PCH code.

Change-Id: Ie92dbf5c6813435995c4d24ed807ffc8d125953a
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36886
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

0 files changed, 0 insertions, 0 deletions