packaging: Remove reference to sheepdog driver

The QEMU sheepdog driver was deprecated in 5.2.0 and removed entirely in
6.1.  Explicitly disabling, therefore is unnecessary from 5.2.0 and will
give an error from 6.1.

fixes #2337

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

tools/packaging/scripts/configure-hypervisor.sh

@@ -222,8 +222,10 @@ generate_qemu_options() {
 
 	# Disabled options
 
-	# Disable sheepdog block driver support
-	qemu_options+=(size:--disable-sheepdog)
+	# Disable sheepdog block driver support (deprecated in 5.2.0)
+	if ! gt_eq ${qemu_version} 5.2.0 ; then
+		qemu_options+=(size:--disable-sheepdog)
+	fi
 
 	# Disable block migration in the main migration stream
 	qemu_options+=(size:--disable-live-block-migration)