[ARM] Orion: rework MPP handling
Instead of having board code poke directly into the MPP configuration registers, and separately calling orion5x_gpio_set_valid_pins() to indicate which MPP pins can be used as GPIO pins, introduce a helper function for configuring the roles of each of the MPP pins, and have that helper function handle gpio validity internally. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com> Acked-by: NSylver Bruneau <sylver.bruneau@googlemail.com> Acked-by: NRussell King <linux@arm.linux.org.uk>
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arch/arm/mach-orion5x/mpp.c
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arch/arm/mach-orion5x/mpp.h
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