vfio/fsl-mc: Fix a typo in a message

L and S are swapped in the message.
s/VFIO_FLS_MC/VFIO_FSL_MC/

Also use 'ret' instead of 'WARN_ON(ret)' to avoid a duplicated message.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Diana Craciun <diana.craciun@oss.nxp.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Link: https://lore.kernel.org/r/a7c1394346725b7435792628c8d4c06a0a745e0b.1662134821.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

drivers/vfio/fsl-mc/vfio_fsl_mc.c

@@ -108,9 +108,9 @@ static void vfio_fsl_mc_close_device(struct vfio_device *core_vdev)
 	/* reset the device before cleaning up the interrupts */
 	ret = vfio_fsl_mc_reset_device(vdev);
 
-	if (WARN_ON(ret))
+	if (ret)
 		dev_warn(&mc_cont->dev,
-			 "VFIO_FLS_MC: reset device has failed (%d)\n", ret);
+			 "VFIO_FSL_MC: reset device has failed (%d)\n", ret);
 
 	vfio_fsl_mc_irqs_cleanup(vdev);