Merge branch 'fib_trie_table_merge_fixes'

Alexander Duyck says:

====================
fib_trie: Minor fixes for table merge

This patch set addresses two issues reported with the tables merged, the
first is a NULL pointer dereference, and the other is to remove a WARN_ON
and set the ordering for aliases from different tables with the same slen
values.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>