wifi: brcmsmac: advertise MFP_CAPABLE to enable WPA3

After being asked about support for WPA3 for BCM43224 chipset it
was found that all it takes is setting the MFP_CAPABLE flag and
mac80211 will take care of all that is needed [1].

Link: https://lore.kernel.org/linux-wireless/20200526155909.5807-2-Larry.Finger@lwfinger.net/ [1]
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Tested-by: Reijer Boekhoff <reijerboekhoff@protonmail.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://patch.msgid.link/20240617122609.349582-1-arend.vanspriel@broadcom.com

drivers/net/wireless/broadcom/brcm80211/brcmsmac/mac80211_if.c

@@ -1090,6 +1090,7 @@ static int ieee_hw_init(struct ieee80211_hw *hw)
 	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 	ieee80211_hw_set(hw, SIGNAL_DBM);
 	ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
+	ieee80211_hw_set(hw, MFP_CAPABLE);
 
 	hw->extra_tx_headroom = brcms_c_get_header_len();
 	hw->queues = N_TX_QUEUES;