pch_gbe: remove suspicious comment

The time stamping code in this driver appears to have been copied from
the ixp4xx_eth.c driver, including this timing comment. I had actually
measured the time stamp delay on an IXP425, but I really doubt that this
value also applies here.
Signed-off-by: NRichard Cochran <richardcochran@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c

@@ -210,7 +210,6 @@ pch_tx_timestamp(struct pch_gbe_adapter *adapter, struct sk_buff *skb)
 
 	/*
 	 * This really stinks, but we have to poll for the Tx time stamp.
-	 * Usually, the time stamp is ready after 4 to 6 microseconds.
 	 */
 	for (cnt = 0; cnt < 100; cnt++) {
 		val = pch_ch_event_read(pdev);