superio/*: Remove redundant chip.h header

Change-Id: If7141112ea67071ee05c52f455c3b2496aa7e17e
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5622
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
src/*: Remove the last remnants of struct keyboard

Change-Id: I7d0e8d2119a470428cfc01c0738b8988ab75ba2d
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5624
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>