mac80211: brcm: disable dump_survey on Raspberry Pi

Enabling this causes slow iwinfo calls on Raspberry Pi and LuCI slows down
when wireless is enabled.
Fixes: https://github.com/openwrt/openwrt/issues/14013

Signed-off-by: Álvaro Fernández Rojas <[email protected]>

package/kernel/mac80211/patches/brcm/865-brcmfmac-disable-dump_survey-on-bcm2835.patch

@@ -0,0 +1,22 @@
+brcmfmac: disable dump_survey on Raspberry Pi
+
+Enabling this causes slow iwinfo calls on Raspberry Pi and LuCI slows down
+when wireless is enabled.
+https://github.com/openwrt/openwrt/issues/14013
+
+Signed-off-by: Álvaro Fernández Rojas <[email protected]>
+---
+
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+@@ -8361,8 +8361,10 @@ struct brcmf_cfg80211_info *brcmf_cfg802
+ 	if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_WOWL_GTK))
+ 		ops->set_rekey_data = brcmf_cfg80211_set_rekey_data;
+ #endif
++#if !defined(CONFIG_ARCH_BCM2835)
+ 	if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_DUMP_OBSS))
+ 		ops->dump_survey = brcmf_cfg80211_dump_survey;
++#endif /* CONFIG_ARCH_BCM2835 */
+ 
+ 	err = wiphy_register(wiphy);
+ 	if (err < 0) {