rt2x00: Add support for RT5360 based PCI devices.

This chip is used at least by the D-Link DWA-525 adapter.

Signed-off-by: Alex Villac&lt;ED&gt;s Lasso <a_villacis@palosanto.com>
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>