It was found that pin 63 also works as input and so the respective function
is renamed from "gpo" to "gpio". The respective commit in Linux is:

	a526973e0291 ("pinctrl: mvebu: Fix mapping of pin 63 (gpo -> gpio)")

which appeared in v4.1-rc3. The devicetrees are fixed accordingly since
commit

	ce5cad51f381 ("ARM: dts: armada-370: Update the mpp63 function in the device tree on Armada 370")

which appeared in v4.6-rc1.

This fixes a runtime warning on the affected machines
(globalscale-mirabox and netgear-rn104) and makes the pin functional
again.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>