rt2800lib: enable MFP if hw crypt is disabled

If rt2800usb is loaded with nohwcrypt=1, mac80211 takes
care of the crypto with software encryption/decryption
and thus, MFP can be used.

Tested for secured mesh using ath9k_htc and ath9k.
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ralink/rt2x00/rt2800lib.c

@@ -7492,6 +7492,10 @@ static int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
 	if (!rt2x00_is_usb(rt2x00dev))
 		ieee80211_hw_set(rt2x00dev->hw, HOST_BROADCAST_PS_BUFFERING);
 
+	/* Set MFP if HW crypto is disabled. */
+	if (rt2800_hwcrypt_disabled(rt2x00dev))
+		ieee80211_hw_set(rt2x00dev->hw, MFP_CAPABLE);
+
 	SET_IEEE80211_DEV(rt2x00dev->hw, rt2x00dev->dev);
 	SET_IEEE80211_PERM_ADDR(rt2x00dev->hw,
 				rt2800_eeprom_addr(rt2x00dev,