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

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

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

qlxgb: clean up empty lines in .c and .h files

sys/dev: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

1. Updated Copyright Information
2. Added Flash Read/Update Support
3. Fixed TSO Handling

Submitted by: David C Somayajulu (davidcs@freebsd.org)
Reviewed by: George Neville-Neil (gnn@freebsd.org)
Approved by: George Neville-Neil (gnn@freebsd.org)

Add QLogic 10 Gigabit Ethernet & CNA Adapter Driver version 1.30
for 3200 and 8200 series cards.

Submitted by: David C Somayajulu (david.somayajulu@qlogic.com),
Qlogic Corporation
MFC After: 3 days