Add Xiaomi MI PAD 4
diff --git a/overlay.mk b/overlay.mk
index 399c7e5..09cf080 100644
--- a/overlay.mk
+++ b/overlay.mk
@@ -23,6 +23,7 @@
 	treble-overlay-xiaomi-mimix2s \
 	treble-overlay-xiaomi-redmi6pro \
 	treble-overlay-xiaomi-mia2lite \
+	treble-overlay-xiaomi-mipad4 \
 	HardwareOverlayPicker \
 	QtiAudio \
 	Touchscreen \