Bindings expect the GPIO key node names to follow certain pattern, see
dtbs_check warnings:

  armada-3720-gl-mv1000.dtb: keys: 'reset' does not match any of the regexes: '^(button|event|key|switch|(button|event|key|switch)...
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>