WAN: dscc4: Fix warning pointing out a bug.

Noticed by Stephen Rothwell:

Today's linux-next build (x86_64 allmodconfig gcc-4.4.0)
produced this warning:

drivers/net/wan/dscc4.c: In function 'dscc4_rx_skb':
drivers/net/wan/dscc4.c:670: warning: suggest parentheses around comparison in operand of '|'

which actually points out a bug, I think. It is doing
(x & (y | z)) != y | z
when it probably means
(x & (y | z)) != (y | z)

Introduced by commit 5de3fcab91b0e1809eec030355d15801daf25083
("WAN: bit and/or confusion").

Signed-off-by: David S. Miller <[e-mail]>

drivers/net/wan/dscc4.c

···
 		else if (!(skb->data[pkt_len] & FrameCrc))
 			dev->stats.rx_crc_errors++;
 		else if ((skb->data[pkt_len] & (FrameVfr | FrameRab)) !=
-				FrameVfr | FrameRab)
+			 (FrameVfr | FrameRab))
 			dev->stats.rx_length_errors++;
 		dev->stats.rx_errors++;
 		dev_kfree_skb_irq(skb);