wifi: rtl8xxxu: declare concurrent mode support for 8188f

Everything is in place now for concurrent mode, we can tell the system
that we support it.
We will allow a maximum of 2 virtual interfaces, one of them can be in
AP mode.

Signed-off-by: Martin Kaistra <[e-mail]>
Reviewed-by: Ping-Ke Shih <[e-mail]>
Signed-off-by: Kalle Valo <[e-mail]>
Link: https://msgid.link/[e-mail]

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h

···
 	u8 init_reg_rxfltmap:1;
 	u8 init_reg_pkt_life_time:1;
 	u8 init_reg_hmtfr:1;
+	u8 supports_concurrent:1;
 	u8 ampdu_max_time;
 	u8 ustime_tsf_edca;
 	u16 max_aggr_num;

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188f.c

···
 	.supports_ap = 1,
 	.max_macid_num = 16,
 	.max_sec_cam_num = 16,
+	.supports_concurrent = 1,
 	.adda_1t_init = 0x03c00014,
 	.adda_1t_path_on = 0x03c00014,
 	.trxff_boundary = 0x3f7f,

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c

···
 	led_classdev_unregister(led);
 }
 
+struct ieee80211_iface_limit rtl8xxxu_limits[] = {
+	{ .max = 2, .types = BIT(NL80211_IFTYPE_STATION), },
+	{ .max = 1, .types = BIT(NL80211_IFTYPE_AP), },
+};
+
+struct ieee80211_iface_combination rtl8xxxu_combinations[] = {
+	{
+		.limits = rtl8xxxu_limits,
+		.n_limits = ARRAY_SIZE(rtl8xxxu_limits),
+		.max_interfaces = 2,
+		.num_different_channels = 1,
+	},
+};
+
 static int rtl8xxxu_probe(struct usb_interface *interface,
 			  const struct usb_device_id *id)
 {
···
 	if (priv->fops->supports_ap)
 		hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
 	hw->queues = 4;
+
+	if (priv->fops->supports_concurrent) {
+		hw->wiphy->iface_combinations = rtl8xxxu_combinations;
+		hw->wiphy->n_iface_combinations = ARRAY_SIZE(rtl8xxxu_combinations);
+	}
 
 	sband = &rtl8xxxu_supported_band;
 	sband->ht_cap.ht_supported = true;