ceph: only use realPath on encryption

The encryption scenario needs to use the /dev path instead of /mnt so
that the udev call from c-v can succeed.

Closes: #5996
Signed-off-by: Sébastien Han <seb@redhat.com>

pkg/daemon/ceph/osd/daemon.go

@@ -441,7 +441,7 @@ func getAvailableDevices(context *clusterd.Context, agent *OsdAgent) (*DeviceOsd
 				// On PVC, we must use the real name not the /mnt name since c-v calls udev
 				// udevadm will fail with
 				// stderr Unknown device, --name=, --path=, or absolute path in /dev/ or /sys expected.
-				if agent.pvcBacked {
+				if agent.pvcBacked && isEncrypted {
 					matchedDevice.Name = device.RealPath
 				}
 				if matched {