Priority: required -> Priority: optional

Change-Id: I50782f4d4f8e4f05b18d078fddb8718e8082b462
diff --git a/debian/control b/debian/control
index 43161c6..e62392b 100644
--- a/debian/control
+++ b/debian/control
@@ -6,7 +6,7 @@
 
 Package: imx-firmware
 Section: misc
-Priority: required
+Priority: optional
 Depends: firmware-atheros
 Architecture: all
 Description: Binary firmwares required for i.MX8