Add missing attribute validation for TIPC_NLA_PROP_MTU
to the netlink policy.
Fixes: 901271e0403a ("tipc: implement configuration of UDP media MTU")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
        [TIPC_NLA_PROP_PRIO]            = { .type = NLA_U32 },
        [TIPC_NLA_PROP_TOL]             = { .type = NLA_U32 },
        [TIPC_NLA_PROP_WIN]             = { .type = NLA_U32 },
+       [TIPC_NLA_PROP_MTU]             = { .type = NLA_U32 },
        [TIPC_NLA_PROP_BROADCAST]       = { .type = NLA_U32 },
        [TIPC_NLA_PROP_BROADCAST_RATIO] = { .type = NLA_U32 }
 };