staging: mt7621-dts: add missing properties to gpio node
In order to let other devices reference the GPIO interrupts if necessary properties 'interrupt-controller' and '#interrupt-cells' becomes necessary. Add both of them to complete gpio device tree node. Signed-off-by: NSergio Paracuellos <sergio.paracuellos@gmail.com> Reviewed-by: NNeilBrown <neil@brown.name> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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