[Arm-netbook] IR controller in Allwinner 10

[lkcl luke]

chinese characters didn't transfer cut/paste, but this is from the EVB
overview document, presumably these are the protocols supported by the
IR interface.

which i've added to the expansion header, because one of the pins is
also an external interrupt (muxed).

l.

A10IR-RXIR-TX
  MIR FIR IrDA 1.1
  0.576 Mbit/s  1.152 Mbit/s Medium Infrared (MIR)
  4 Mbit/s FIR IrDA 1.4
  CIR