Backports the SPDX 3.0 support and fixes from upstream walnascar
commit 49f47169953b807d430461ca33f3a2b076119712 into upstream
scarthgap.
(From OE-Core rev: 9c9b9545049a2f6e5c99edcb079275d29a4d1ac6)
Signed-off-by: Kamel Bouhara (Schneider Electric) <kamel.bouhara@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>