freescale: remove incorrect copied comment

The comment in question is word-for-word copied from ixgbe, and clearly
has no meaning in freescale's driver. (it even says 'return an error'
when the code clearly does not). Remove the comment as it is obviously
incorrect and not applicable to the code as it is today.

CC: Pantelis Antoniou <pantelis.antoniou@gmail.com>
CC: Vitaly Bordug <vbordug@ru.mvista.com>
CC: <linuxppc-dev@lists.ozlabs.org>
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Acked-by: NRichard Cochran <richardcochran@gmail.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/freescale/fec_ptp.c

@@ -506,12 +506,6 @@ int fec_ptp_set(struct net_device *ndev, struct ifreq *ifr)
 		break;
 
 	default:
-		/*
-		 * register RXMTRL must be set in order to do V1 packets,
-		 * therefore it is not possible to time stamp both V1 Sync and
-		 * Delay_Req messages and hardware does not support
-		 * timestamping all packets => return error
-		 */
 		fep->hwts_rx_en = 1;
 		config.rx_filter = HWTSTAMP_FILTER_ALL;
 		break;