[][MAC80211][build][Fix patch fail]

[Description]
Fix patch fail
Add symbolic link of mt76-vendor for unified sigma support.
Remove unnecessary compiler flag in MT76 makefile

[Release-log]
N/A

Change-Id: Ia4e297c0648a77c4e500d926fb617cba6a1a85fb
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6140808
diff --git a/autobuild_mac80211_release/package/kernel/mt76/patches/1112-mt76-mt7915-init-rssi-in-WTBL-when-add-station.patch b/autobuild_mac80211_release/package/kernel/mt76/patches/1112-mt76-mt7915-init-rssi-in-WTBL-when-add-station.patch
index 523648a..3bcc928 100644
--- a/autobuild_mac80211_release/package/kernel/mt76/patches/1112-mt76-mt7915-init-rssi-in-WTBL-when-add-station.patch
+++ b/autobuild_mac80211_release/package/kernel/mt76/patches/1112-mt76-mt7915-init-rssi-in-WTBL-when-add-station.patch
@@ -1,17 +1,17 @@
-From ca953d62563e4084e1ea3b81882934e27711ed26 Mon Sep 17 00:00:00 2001
+From 40ba703e0b33d0c1ca7532d556ea9fcf9111f5b8 Mon Sep 17 00:00:00 2001
 From: Peter Chiu <chui-hao.chiu@mediatek.com>
 Date: Sun, 24 Apr 2022 10:07:00 +0800
 Subject: [PATCH 1112/1115] mt76: mt7915: init rssi in WTBL when add station
 
 ---
- drivers/net/wireless/mediatek/mt76/mt7915/main.c | 4 ++++
+ mt7915/main.c | 4 ++++
  1 file changed, 4 insertions(+)
 
 diff --git a/mt7915/main.c b/mt7915/main.c
-index 41bc2c30..5f3e2c2d 100644
+index e4b2076..ebff255 100644
 --- a/mt7915/main.c
 +++ b/mt7915/main.c
-@@ -662,6 +662,7 @@ int mt7915_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
+@@ -666,6 +666,7 @@ int mt7915_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
  	struct mt7915_phy *phy;
  #endif
  	int ret, idx;
@@ -19,7 +19,7 @@
  
  	idx = mt76_wcid_alloc(dev->mt76.wcid_mask, MT7915_WTBL_STA);
  	if (idx < 0)
-@@ -683,6 +684,9 @@ int mt7915_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
+@@ -687,6 +688,9 @@ int mt7915_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
  	if (ret)
  		return ret;
  
@@ -30,5 +30,5 @@
  	mt7915_vendor_amnt_sta_remove(mvif->phy, sta);
  #endif
 -- 
-2.25.1
+2.18.0