replace all references to rt2800_register_read/write
with the rt2x00pci_register_read/write variants.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
ªÖ€œ4x