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/cassini.c b/drivers/net/cassini.c
index 32aaadc..d6b6d6a 100644
--- a/drivers/net/cassini.c
+++ b/drivers/net/cassini.c
@@ -419,7 +419,7 @@
 		udelay(10);
 		cmd = readl(cp->regs + REG_MIF_FRAME);
 		if (cmd & MIF_FRAME_TURN_AROUND_LSB)
-			return (cmd & MIF_FRAME_DATA_MASK);
+			return cmd & MIF_FRAME_DATA_MASK;
 	}
 	return 0xFFFF; /* -1 */
 }
@@ -804,7 +804,7 @@
 			break;
 		udelay(10);
 	}
-	return (limit <= 0);
+	return limit <= 0;
 }
 
 static int cas_saturn_firmware_init(struct cas *cp)