vdpa/pds: use %pe for ERR_PTR() in event handler registration

Use %pe instead of %ps when printing ERR_PTR() values. %ps is intended
for string pointers, while %pe correctly prints symbolic error names
for error pointers returned via ERR_PTR().
This shows the returned error value more clearly.

Fixes: 67f27b8b3a34 ("pds_vdpa: subscribe to the pds_core events")
Signed-off-by: Alok Tiwari <[e-mail]>
Reviewed-by: Brett Creeley <[e-mail]>
Signed-off-by: Michael S. Tsirkin <[e-mail]>
Message-Id: <[e-mail]>

drivers/vdpa/pds/vdpa_dev.c

···
 		err = pdsc_register_notify(nb);
 		if (err) {
 			nb->notifier_call = NULL;
-			dev_err(dev, "failed to register pds event handler: %ps\n",
+			dev_err(dev, "failed to register pds event handler: %pe\n",
 				ERR_PTR(err));
 			return -EINVAL;
 		}