ARM: Dove: Remove PXA compatibility IRQ defines.

These are not currently used anywhere, but when the relevant
peripherals are enabled on the Dove port, the IRQ numbers should be
passed into the drivers via platform device resources rather than
having the drivers get them from platform headers directly.

Signed-off-by: Lennert Buytenhek <buytenh@secretlab.ca>
Acked-by: Saeed Bishara <saeed@marvell.com>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>