commit 9eac6d0a (ARM: Remove dependency of plat-orion GPIO code on mach
directory includes) missed to convert one instance of
DOVE_GPIO_VIRT_BASE and left the orion_gpio_init() in mpp.c

Fix it up.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

Signed-off-by: NMike Rapoport <mike@compulab.co.il>
Acked-by: NSaeed Bishara <saeed@marvell.com>
Signed-off-by: NNicolas Pitre <nico@fluxnic.net>