Buttons don't have a reg property; drop pseudo address and fixup names
of individual button nodes. Also drop #address-cells and #size-cells
properties.
Signed-off-by: NRalph Sennhauser <ralph.sennhauser@gmail.com>
Signed-off-by: NImre Kaloz <kaloz@openwrt.org>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>