[PATCH RESEND] Documentation: devicetree: Clean up gpio-keys example

Hello Andreas,

On Mon, Mar 7, 2016 at 3:24 PM, Andreas F?rber [off-list ref] wrote:

Drop #address-cells and #size-cells, which are not required by the
gpio-keys binding documentation, as button sub-nodes are not devices.

Reported-by: Julien Chauveau <redacted>
Signed-off-by: Andreas F?rber <afaerber@suse.de>

Looks good to me.

Reviewed-by: Javier Martinez Canillas <redacted>

Best regards,
Javier