[ARM] 5009/1: magician: remove to-be-deprecated defines for pxa_gpio_mode

Alternate function and direction setting is now handled
by the MFP config code or the generic GPIO API.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>