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.

sys/dev/aac/aac.c

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2000 Michael Smith
  * Copyright (c) 2001 Scott Long
  * Copyright (c) 2000 BSDi

sys/dev/aac/aac_cam.c

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2002 Adaptec, Inc.
  * All rights reserved.
  *

sys/dev/aac/aac_debug.c

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2000 Michael Smith
  * Copyright (c) 2001 Scott Long
  * Copyright (c) 2000 BSDi

sys/dev/aac/aac_disk.c

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2000 Michael Smith
  * Copyright (c) 2001 Scott Long
  * Copyright (c) 2000 BSDi

sys/dev/aac/aac_linux.c

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2002 Scott Long
  * All rights reserved.
  *

sys/dev/aac/aac_pci.c

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2000 Michael Smith
  * Copyright (c) 2001 Scott Long
  * Copyright (c) 2000 BSDi

sys/dev/aac/aac_tables.h

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2000 Michael Smith
  * Copyright (c) 2000 BSDi
  * All rights reserved.

sys/dev/aac/aacreg.h

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2000 Michael Smith
  * Copyright (c) 2000-2001 Scott Long
  * Copyright (c) 2000 BSDi

sys/dev/aac/aacvar.h

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2000 Michael Smith
  * Copyright (c) 2001 Scott Long
  * Copyright (c) 2000 BSDi

sys/dev/aacraid/aacraid.c

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2000 Michael Smith
  * Copyright (c) 2001 Scott Long
  * Copyright (c) 2000 BSDi

sys/dev/aacraid/aacraid_cam.c

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2002-2010 Adaptec, Inc.
  * Copyright (c) 2010-2012 PMC-Sierra, Inc.
  * All rights reserved.

sys/dev/aacraid/aacraid_debug.c

-
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2006-2010 Adaptec, Inc.
  * Copyright (c) 2010-2012 PMC-Sierra, Inc.
  * All rights reserved.

sys/dev/aacraid/aacraid_debug.h

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2010 Adaptec, Inc.
  * Copyright (c) 2010-2012 PMC-Sierra, Inc.
  * All rights reserved.

sys/dev/aacraid/aacraid_linux.c

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2002 Scott Long
  * Copyright (c) 2002-2010 Adaptec, Inc.
  * Copyright (c) 2010-2012 PMC-Sierra, Inc.

sys/dev/aacraid/aacraid_pci.c

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2000 Michael Smith
  * Copyright (c) 2001 Scott Long
  * Copyright (c) 2000 BSDi

sys/dev/aacraid/aacraid_reg.h

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2000 Michael Smith
  * Copyright (c) 2000-2001 Scott Long
  * Copyright (c) 2000 BSDi

sys/dev/aacraid/aacraid_var.h

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2000 Michael Smith
  * Copyright (c) 2001 Scott Long
  * Copyright (c) 2000 BSDi

sys/dev/adb/adb.h

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (C) 2008 Nathan Whitehorn
  * All rights reserved.
  *

sys/dev/adb/adb_bus.c

 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (C) 2008 Nathan Whitehorn
  * All rights reserved.
  *

sys/dev/adb/adb_buttons.c

 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 2011, Justin Hibbits.
  * Copyright (c) 2002, Miodrag Vallat.
  * Copyright (C) 1999 Tsubai Masanari.  All rights reserved.