sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

Add missing FreeBSD tags and SVN properties to ibcore.

MFC after: 1 week
Sponsored by: Mellanox Technologies

Initial RoCE/infiniband kernel update to Linux v4.9.

This patch currently supports:
- ibcore as a kernel module only
- krping as a kernel module only
- ipoib as a kernel module only

Sponsored by: Mellanox Technologies