Revert "xfrm: fix "disable_policy" on ipv4 early demux"

This reverts commit 497653f6 which is
commit 3a591318 upstream.  It is not
needed here as the commit it fixes, e6175a2e ("xfrm: fix
"disable_policy" flag use when arriving from different devices"), was
already reverted from this branch due to ABI issues.

Bug: 161946584
Change-Id: I9bcc08425bf73b6fd1dcad8d801ffc728e1021b6
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>