Add missing include

Author: Kh-Oleg

drivers/tee/tee_core.c

@@ -9,6 +9,7 @@
 #include <linux/cred.h>
 #include <linux/fs.h>
 #include <linux/idr.h>
+#include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/tee_core.h>