GPIO: mvebu: Allow all plat-orion platforms.

Kirkwood & Dove can also use this driver, so expand the scope to
include all platform orion devices.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

drivers/gpio/Kconfig

@@ -152,7 +152,7 @@ config GPIO_MSM_V2
 
 config GPIO_MVEBU
 	def_bool y
-	depends on ARCH_MVEBU
+	depends on PLAT_ORION
 	select GPIO_GENERIC
 	select GENERIC_IRQ_CHIP