The Kirkwood-based PlatHome OpenBlocks A6 board has an Init button
connected to MPP pin 38. This commit adds support for this button.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: NAndrew Lunn <andrew@lunn.ch>
Tested-by: NAtsushi Yamagata <yamagata@plathome.co.jp>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>