[][Add macsec HW offload backport from kernel 5.18]

[Description]
Add macsec HW offload backport from kernel 5.18.

[Release-log]
N/A

Change-Id: I5b143fe620ec4bcae4075d1d85db5e41c8d48717
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5981730
diff --git a/target/linux/mediatek/patches-5.4/999-1750-v5.18-net-macsec-get-ready-to-backport-from-5-18.patch b/target/linux/mediatek/patches-5.4/999-1750-v5.18-net-macsec-get-ready-to-backport-from-5-18.patch
new file mode 100644
index 0000000..486e91c
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/999-1750-v5.18-net-macsec-get-ready-to-backport-from-5-18.patch
@@ -0,0 +1,19 @@
+--- a/drivers/net/macsec.c
++++ b/drivers/net/macsec.c
+@@ -16,7 +16,6 @@
+ #include <net/genetlink.h>
+ #include <net/sock.h>
+ #include <net/gro_cells.h>
+-#include <linux/if_arp.h>
+ 
+ #include <uapi/linux/if_macsec.h>
+ 
+@@ -3240,8 +3239,6 @@ static int macsec_newlink(struct net *ne
+ 	real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
+ 	if (!real_dev)
+ 		return -ENODEV;
+-	if (real_dev->type != ARPHRD_ETHER)
+-		return -EINVAL;
+ 
+ 	dev->priv_flags |= IFF_MACSEC;
+