rtl8821cu: bump to 5.8.1

TODO: project-openwrt/openwrt#53 is still broken.

package/ctcgfw/rtl8821cu/Makefile

@@ -9,15 +9,15 @@ include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=rtl8821cu
-PKG_VERSION:=20200302
+PKG_VERSION:=5.8.1
 PKG_RELEASE:=1
 PKG_LICENSE:=GPLv3
 
 PKG_SOURCE_URL:=https://github.com/brektrou/rtl8821CU.git
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_DATE:=2020-03-02
-PKG_SOURCE_VERSION:=ca0bcba405f8865e6acd6a6d3cacf93f7e1b8a2c
-PKG_MIRROR_HASH:=8fff72eea0e64dac4f6f1cbb174aed052ab37f87787e575b295daa15886f3b33
+PKG_SOURCE_VERSION:=7756a7ab6b4dfd105d36d8433a72802ac0620d53
+PKG_MIRROR_HASH:=4e9ac6bcedc0d3fc7d4b44be2076d6b9838d404ce0b8a8158b12287e9c0f53b6
 
 PKG_MAINTAINER:=[CTCGFW] Project OpenWrt
 PKG_BUILD_PARALLEL:=1

package/ctcgfw/rtl8821cu/patches/020-fix-build-on-4.19.patch

@@ -1,24 +0,0 @@
-diff --git a/os_dep/linux/os_intfs.c b/os_dep/linux/os_intfs.c
-index 660bacf..a73a664 100644
---- a/os_dep/linux/os_intfs.c
-+++ b/os_dep/linux/os_intfs.c
-@@ -1190,6 +1190,11 @@ unsigned int rtw_classify8021d(struct sk_buff *skb)
- }
- 
- 
-+#if (LINUX_VERSION_CODE>=KERNEL_VERSION(4,19,0))
-+static u16 rtw_select_queue(struct net_device *dev, struct sk_buff *skb,
-+				struct net_device *sb_dev,
-+				select_queue_fallback_t fallback)
-+#else
- static u16 rtw_select_queue(struct net_device *dev, struct sk_buff *skb
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
- 	, void *accel_priv
-@@ -1198,6 +1203,7 @@ static u16 rtw_select_queue(struct net_device *dev, struct sk_buff *skb
- 	#endif
- #endif
- )
-+#endif
- {
- 	_adapter	*padapter = rtw_netdev_priv(dev);
- 	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;