antfs: require kernel version 5.10 to build

ANTFS does not compile with OpenWrt's current testing kernel 5.15,
as it needs to be modified for the Linux 5.12 idmapped mounts changes
2f221d6f7b88 ("attr: handle idmapped mounts")
https://lore.kernel.org/all/20210121131959.646623-1-christian.brauner@ubuntu.com/

Signed-off-by: John Thomson <git@johnthomson.fastmail.com.au>
(cherry picked from commit f043d0a7d8)

kernel/antfs/Makefile

@@ -20,7 +20,7 @@ define KernelPackage/fs-antfs
 	TITLE:=AVM NTFS Read/Write Driver
 	FILES:=$(PKG_BUILD_DIR)/antfs.ko
 	AUTOLOAD:=$(call AutoLoad,30,antfs,1)
-	DEPENDS:=+kmod-nls-base
+	DEPENDS:=+kmod-nls-base @LINUX_5_10
 endef
 
 define KernelPackage/fs-antfs/description