rt2800pci: fix comment about IV/EIV fields

The bit tested by hardware is TXD_W3_WIV and its value
equals the negated value of ENTRY_TXD_ENCRYPT_IV bit.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2800pci.c

@@ -2206,8 +2206,8 @@ static void rt2800pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 
 	/*
 	 * Always write 0 to IV/EIV fields, hardware will insert the IV
-	 * from the IVEIV register when ENTRY_TXD_ENCRYPT_IV is set to 0.
-	 * When ENTRY_TXD_ENCRYPT_IV is set to 1 it will use the IV data
+	 * from the IVEIV register when TXD_W3_WIV is set to 0.
+	 * When TXD_W3_WIV is set to 1 it will use the IV data
 	 * from the descriptor. The TXWI_W1_WIRELESS_CLI_ID indicates which
 	 * crypto entry in the registers should be used to encrypt the frame.
 	 */