hammerhead: fix typo in device.te

Bug: 22010972
Signed-off-by: Patrick Tjin <pattjin@google.com>
diff --git a/sepolicy/device.te b/sepolicy/device.te
index 81e6f4e..6c01d73 100644
--- a/sepolicy/device.te
+++ b/sepolicy/device.te
@@ -1,6 +1,6 @@
 type wlan_device, dev_type;
 
-type diag_device, dev_type, mistrustedobject;
+type diag_device, dev_type, mlstrustedobject;
 type ramdump_device, dev_type;
 
 type smd_device, dev_type;