[DECNET]: fix misannotation of linkinfo_dn

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/dn.h

@@ -113,7 +113,7 @@ struct accessdata_dn
  * DECnet logical link information structure
  */
 struct linkinfo_dn {
-        __le16  idn_segsize;    /* Segment size for link */
+        __u16  idn_segsize;    /* Segment size for link */
         __u8   idn_linkstate;  /* Logical link state    */
 };