Revert "xfrm: fix "disable_policy" flag use when arriving from different devices"

This reverts commit 47f04f95 which is
e6175a2e commit upstream.

It breaks the Android kernel ABI and if this really needs to be added to
Android, it must come back in a format in the future that does not break
the abi.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ibb0fcc031d2bf71f137d3c760d84858436acc801