Move the SPDX_SUPPLIER variable to create-spdx-2.2 since it's format
only has meaning in SPDX 2.2 (SPDX 3 uses SPDX_PACKAGE_SUPPLIER with a
different format)
(From OE-Core rev: 628c1e04072178d2c8095e53d5f6600c45a2679f)
Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>