ptp: Relocate lookup cookie to correct block.

An earlier commit set the pps_lookup cookie, but the line
was somehow added to the wrong code block.  Correct this.

Fixes: 8602e40f ("ptp: Set lookup cookie when creating a PTP PPS source.")
Signed-off-by: NJonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: NDario Binacchi <dariobin@libero.it>
Acked-by: NRichard Cochran <richardcochran@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/ptp/ptp_clock.c

@@ -232,7 +232,6 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info,
 			pr_err("failed to create ptp aux_worker %d\n", err);
 			goto kworker_err;
 		}
-		ptp->pps_source->lookup_cookie = ptp;
 	}
 
 	/* PTP virtual clock is being registered under physical clock */
@@ -268,6 +267,7 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info,
 			pr_err("failed to register pps source\n");
 			goto no_pps;
 		}
+		ptp->pps_source->lookup_cookie = ptp;
 	}
 
 	/* Initialize a new device of our class in our clock structure. */