libpayload: Don't let USB/PC/serial keyboards overwrite each other

Change-Id: I75c0066cf737e0cecac056487215622e2b3d4467
Signed-off-by: Dave Frodin <dave.frodin@se-eng.com>
Reviewed-on: http://review.coreboot.org/1981
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed