rt2x00: Fix comments in rt73usb.h and rt61pci.h

This patch fixes a few comments in rt73usb.h and rt61pci.h.
Signed-off-by: Lalith Suresh <suresh.lalith@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt61pci.h

@@ -412,7 +412,7 @@ struct hw_pairwise_ta_entry {
  * DROP_VERSION_ERROR: Drop version error frame.
  * DROP_MULTICAST: Drop multicast frames.
  * DROP_BORADCAST: Drop broadcast frames.
- * ROP_ACK_CTS: Drop received ACK and CTS.
+ * DROP_ACK_CTS: Drop received ACK and CTS.
  */
 #define TXRX_CSR0			0x3040
 #define TXRX_CSR0_RX_ACK_TIMEOUT	FIELD32(0x000001ff)

drivers/net/wireless/rt2x00/rt73usb.h

@@ -322,7 +322,7 @@ struct hw_pairwise_ta_entry {
  * DROP_VERSION_ERROR: Drop version error frame.
  * DROP_MULTICAST: Drop multicast frames.
  * DROP_BORADCAST: Drop broadcast frames.
- * ROP_ACK_CTS: Drop received ACK and CTS.
+ * DROP_ACK_CTS: Drop received ACK and CTS.
  */
 #define TXRX_CSR0			0x3040
 #define TXRX_CSR0_RX_ACK_TIMEOUT	FIELD32(0x000001ff)