问下这个 mt76 的驱动为什么 5.4 版本限制了置顶版本？

[asiaon123]

include $(TOPDIR)/rules.mk

PKG_NAME:=mt76
PKG_RELEASE=1

PKG_LICENSE:=GPLv2
PKG_LICENSE_FILES:=

PKG_SOURCE_URL:=https://github.com/openwrt/mt76
PKG_SOURCE_PROTO:=git

ifdef CONFIG_LINUX_5_4
PKG_SOURCE_DATE:=2022-12-22
PKG_SOURCE_VERSION:=5b509e80384ab019ac11aa90c81ec0dbb5b0d7f2
PKG_MIRROR_HASH:=6fc25df4d28becd010ff4971b23731c08b53e69381a9e4c868091899712f78a9
PATCH_DIR:=./patches-5.4
else
PKG_SOURCE_DATE:=2023-08-14
PKG_SOURCE_VERSION:=b14c2351ddb8601c322576d84029e463d456caef
PKG_MIRROR_HASH:=62b5e157ad525424b6857e77ed373e8d39d03af71b057f8b309d8b293d6eac5f
endif