kernel: Fix MODULE_IMPORT_NS

Author: rsuntk

kernel/ksu.c

@@ -95,6 +95,8 @@ MODULE_LICENSE("GPL");
 MODULE_AUTHOR("weishu");
 MODULE_DESCRIPTION("Android KernelSU");
 
+// Fix MODULE_IMPORT_NS error
+#include <linux/version.h>
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 0)
 MODULE_IMPORT_NS(VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver);
-#endif
+#endif