Add gpio-keys codes for all boards. These are mostly INPUT_KEY_0 and so on but I've used some more specific ones where it was obvious that there's something else on the boards. Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add board definition for the NXP LPCXpresso51U68 development board. Signed-off-by: Navin Sankar Velliangiri <navin@linumiz.com>