[][MAC80211][core][refine backports patches]

[Description]
Refactor backports patches and apply new naming rule.

[Release-log]
N/A

Change-Id: I04fb82509f18341989ce381ad1f1e53f5ec2d4ee
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7135679
diff --git a/autobuild_mac80211_release/package/kernel/mac80211_dev/patches/subsys/mtk-0005-mac80211-mtk-it-s-invalid-case-when-frag_threshold-i.patch b/autobuild_mac80211_release/package/kernel/mac80211_dev/patches/subsys/mtk-0005-mac80211-mtk-it-s-invalid-case-when-frag_threshold-i.patch
new file mode 100644
index 0000000..8008118
--- /dev/null
+++ b/autobuild_mac80211_release/package/kernel/mac80211_dev/patches/subsys/mtk-0005-mac80211-mtk-it-s-invalid-case-when-frag_threshold-i.patch
@@ -0,0 +1,28 @@
+From 8c3a225a17490db52b25662bd56f4a0edc10bd1c Mon Sep 17 00:00:00 2001
+From: Bo Jiao <Bo.Jiao@mediatek.com>
+Date: Fri, 1 Apr 2022 09:15:21 +0800
+Subject: [PATCH 05/16] mac80211: mtk: it's invalid case when frag_threshold is
+ greater than 2346
+
+Signed-off-by: Bo Jiao <Bo.Jiao@mediatek.com>
+---
+ net/wireless/nl80211.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
+index d3b03ab..aa04e11 100644
+--- a/net/wireless/nl80211.c
++++ b/net/wireless/nl80211.c
+@@ -3615,6 +3615,9 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
+ 			goto out;
+ 		}
+ 
++		if (frag_threshold >= 2346)
++			frag_threshold = (u32) -1;
++
+ 		if (frag_threshold != (u32) -1) {
+ 			/*
+ 			 * Fragments (apart from the last one) are required to
+-- 
+2.25.1
+