rt2x00: rt2800pci: move rt2800mmio_enable_radio function to another module

Move the function into the rt2800mmio module, in order
to make it usable from other modules.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2800mmio.h b/drivers/net/wireless/rt2x00/rt2800mmio.h
index 392895a..6a10de3 100644
--- a/drivers/net/wireless/rt2x00/rt2800mmio.h
+++ b/drivers/net/wireless/rt2x00/rt2800mmio.h
@@ -159,4 +159,7 @@
 int rt2800mmio_init_queues(struct rt2x00_dev *rt2x00dev);
 int rt2800mmio_init_registers(struct rt2x00_dev *rt2x00dev);
 
+/* Device state switch handlers. */
+int rt2800mmio_enable_radio(struct rt2x00_dev *rt2x00dev);
+
 #endif /* RT2800MMIO_H */