mainboard: Do not redefine DRIVERS_PS2_KEYBOARD Kconfig variable

Change-Id: Icc603dfe92360d978221a25ad28517da43942bea
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/8498
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
19 files changed