wifi: rtw89: declare MCC in interface combination

MCC (multi-channel concurrency) supports two combinations as below.
* P2P-GO + STA
* P2P-GC + STA
We add the corresponding ieee80211_iface_limit for it into
ieee80211_iface_combination.

Besides, for multiple channels, it must run with mac80211 chanctx.
So, only with it, ieee80211_iface_combination can allow MCC case.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230921003559.11588-5-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/core.c

@@ -172,13 +172,31 @@ static const struct ieee80211_iface_limit rtw89_iface_limits[] = {
 	},
 };
 
+static const struct ieee80211_iface_limit rtw89_iface_limits_mcc[] = {
+	{
+		.max = 1,
+		.types = BIT(NL80211_IFTYPE_STATION),
+	},
+	{
+		.max = 1,
+		.types = BIT(NL80211_IFTYPE_P2P_CLIENT) |
+			 BIT(NL80211_IFTYPE_P2P_GO),
+	},
+};
+
 static const struct ieee80211_iface_combination rtw89_iface_combs[] = {
 	{
 		.limits = rtw89_iface_limits,
 		.n_limits = ARRAY_SIZE(rtw89_iface_limits),
 		.max_interfaces = 2,
 		.num_different_channels = 1,
-	}
+	},
+	{
+		.limits = rtw89_iface_limits_mcc,
+		.n_limits = ARRAY_SIZE(rtw89_iface_limits_mcc),
+		.max_interfaces = 2,
+		.num_different_channels = 2,
+	},
 };
 
 bool rtw89_ra_report_to_bitrate(struct rtw89_dev *rtwdev, u8 rpt_rate, u16 *bitrate)
@@ -4285,7 +4303,11 @@ struct rtw89_dev *rtw89_alloc_ieee80211_hw(struct device *device,
 		goto err;
 
 	hw->wiphy->iface_combinations = rtw89_iface_combs;
-	hw->wiphy->n_iface_combinations = ARRAY_SIZE(rtw89_iface_combs);
+
+	if (no_chanctx || chip->support_chanctx_num == 1)
+		hw->wiphy->n_iface_combinations = 1;
+	else
+		hw->wiphy->n_iface_combinations = ARRAY_SIZE(rtw89_iface_combs);
 
 	rtwdev = hw->priv;
 	rtwdev->hw = hw;