drivers/net: return operator cleanup

Change "return (EXPR);" to "return EXPR;"

return is not a function, parentheses are not required.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wan/pc300_drv.c b/drivers/net/wan/pc300_drv.c
index fbf1175..f875cfa 100644
--- a/drivers/net/wan/pc300_drv.c
+++ b/drivers/net/wan/pc300_drv.c
@@ -451,11 +451,11 @@
 		if ((status & DST_EOM) || (first_bd == card->chan[ch].rx_last_bd)) {
 			/* Return the size of a good frame or incomplete bad frame 
 			* (dma_buf_read will clean the buffer descriptors in this case). */
-			return (rcvd);
+			return rcvd;
 		}
 		ptdescr = (card->hw.rambase + cpc_readl(&ptdescr->next));
 	}
-	return (-1);
+	return -1;
 }
 
 /*
@@ -557,7 +557,7 @@
 		cpc_writel(card->hw.scabase + DRX_REG(EDAL, ch),
 			   RX_BD_ADDR(ch, chan->rx_last_bd));
 	}
-	return (rcvd);
+	return rcvd;
 }
 
 static void tx_dma_stop(pc300_t * card, int ch)
@@ -1733,7 +1733,7 @@
 	pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
 	falc_t *pfalc = (falc_t *) & chan->falc;
 
-	return (pfalc->bec);
+	return pfalc->bec;
 }
 
 /**********************************/
@@ -2819,7 +2819,7 @@
 	*br_io = 0;
 
 	if (rate == 0)
-		return (0);
+		return 0;
 
 	for (br = 0, br_pwr = 1; br <= 9; br++, br_pwr <<= 1) {
 		if ((tc = clock / br_pwr / rate) <= 0xff) {
@@ -2832,11 +2832,11 @@
 		error = ((rate - (clock / br_pwr / rate)) / rate) * 1000;
 		/* Errors bigger than +/- 1% won't be tolerated */
 		if (error < -10 || error > 10)
-			return (-1);
+			return -1;
 		else
-			return (tc);
+			return tc;
 	} else {
-		return (-1);
+		return -1;
 	}
 }
 
@@ -3207,7 +3207,7 @@
 			break;
 		}
 	}
-	return (i);
+	return i;
 }
 
 static void plx_init(pc300_t * card)