OpenBSD: Make OpenBSD 4.7 param headers consistent

OpenBSD: Make OpenBSD 4.7 param headers consistent

OpenBSD follows the policy of using a separate common
param file (post 1.4.x). However, when introducing support
for i386 OpenBSD 4.7, this was not done and a single param
config header file was created instead. This patch changes
the param files for OpenBSD 4.7 so that they are
consistent with the other OpenBSD versions by using a
separate common param header file.

Change-Id: I9d828d2447a2d018eeea0fbe9f4c047ac819d209
Reviewed-on: http://gerrit.openafs.org/3725
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>