Both of the aforementioned macros have been present in FreeBSD
for well over a decade: 2009 for `KOBJMETHOD_END`; 2011 for
`DEVMETHOD_END`.

Adapt all hardcoded references of `{0, 0}` with `DEVMETHOD_END`
and `KOBJMETHOD_END` as appropriate. This helps ensure that
future adaptations to drivers following patterns documented
in driver(9) can be made more easily/without issue.

MFC after:	1 week
Differential Revision:	 https://reviews.freebsd.org/D55414

MFC notes:
	All conflicts were dropped as they didn't apply to code in branch.

Conflicts:
	sys/dev/flash/w25n.c
	sys/dev/nvd/nvd.c
	sys/dev/nvme/nvme_sim.c
	sys/dev/sound/pci/hdsp-pcm.c
	sys/dev/sound/pci/hdsp.c
	sys/dev/ufshci/ufshci_pci.c

(cherry picked from commit 0fc6c3f731a2cca3120798806c330a3081c9424b)

- s/unspported/unsupported/

(cherry picked from commit 84d75bb018e1800d610760191ff64c3eebcb46d7)

- s/strucutre/structure/

(cherry picked from commit ced92d000a9435745ca2891734e6e37ab1c5e873)

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

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

Although unused, fixed type in CISS_BOARD_UNKNOWN #define.

Submitted by: Peter Eriksson (a trivial part of D25155)