qlge: Fix sparse endian warning in ql_hw_csum_setup().

Changed u16 to __sum16 usage.

Warnings:
drivers/net/qlge/qlge_main.c:1897:9: warning: incorrect type in assignment (different base types)
drivers/net/qlge/qlge_main.c:1897:9:    expected unsigned short [usertype] *check
drivers/net/qlge/qlge_main.c:1897:9:    got restricted unsigned short *<noident>
drivers/net/qlge/qlge_main.c:1903:9: warning: incorrect type in assignment (different base types)
drivers/net/qlge/qlge_main.c:1903:9:    expected unsigned short [usertype] *check
drivers/net/qlge/qlge_main.c:1903:9:    got restricted unsigned short *<noident>
drivers/net/qlge/qlge_main.c:1909:9: warning: incorrect type in assignment (different base types)
drivers/net/qlge/qlge_main.c:1909:9:    expected unsigned short [unsigned] [short] [usertype] <noident>

Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/qlge/qlge_main.c

@@ -1884,7 +1884,7 @@ static void ql_hw_csum_setup(struct sk_buff *skb,
 {
 	int len;
 	struct iphdr *iph = ip_hdr(skb);
-	u16 *check;
+	__sum16 *check;
 	mac_iocb_ptr->opcode = OPCODE_OB_MAC_TSO_IOCB;
 	mac_iocb_ptr->frame_len = cpu_to_le32((u32) skb->len);
 	mac_iocb_ptr->net_trans_offset =