Revert "tcp: bring back NUMA dispersion in inet_ehash_locks_alloc()"

This reverts commit b53d6e95 which is
commit f8ece407 upstream.

It breaks the Android kernel build and can be brought back in the future
in an safe way if it is really needed.

Bug: 161946584
Change-Id: Id9c7847d085587a405eeacd35b32c5cc82e36d2e
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>