qemu-iotests: add support for qed format

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/tests/qemu-iotests/common b/tests/qemu-iotests/common
index 988fd5e..d95ba4c 100644
--- a/tests/qemu-iotests/common
+++ b/tests/qemu-iotests/common
@@ -119,6 +119,7 @@
     -cow                test cow
     -qcow               test qcow
     -qcow2              test qcow2
+    -qed                test qed
     -vdi                test vdi
     -vpc                test vpc
     -vmdk               test vmdk
@@ -158,6 +159,11 @@
 	    xpand=false
 	    ;;
 
+	-qed)
+	    IMGFMT=qed
+	    xpand=false
+	    ;;
+
 	-vdi)
 	    IMGFMT=vdi
 	    xpand=false