net: rtnetlink: fix a typo fbd -> fdb

A simple typo fix in the nl error message (fbd -> fdb).

CC: David Ahern <dsahern@gmail.com>
Fixes: 8c6e137f ("rtnetlink: Update rtnl_fdb_dump for strict data checking")
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/rtnetlink.c

@@ -3917,7 +3917,7 @@ static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
 	ndm = nlmsg_data(nlh);
 	if (ndm->ndm_pad1  || ndm->ndm_pad2  || ndm->ndm_state ||
 	    ndm->ndm_flags || ndm->ndm_type) {
-		NL_SET_ERR_MSG(extack, "Invalid values in header for fbd dump request");
+		NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
 		return -EINVAL;
 	}