samsung: dfu: Provide correct Vendor and Product IDs for UMS gadget

It is necessary to provide the same Vendor and Product IDs as the one in
the original Linux kernel code.

Without this change the USB mass storage gadget is not working with Windows7.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Minkyu Kang <mk7.kang@samsung.com>
test: dfu: Extend dfu_gadget_test_init.sh to accept sizes of test files

It is now possible to pass to the dfu_gadget_test_init.sh script the sizes
of files to be generated.

This feature is required by UMS tests which reuse this code.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
test: dfu: cosmetic: Add missing license information to DFU test scripts

By mistake I've forgotten to add the SPDX license tags for the DFU testing
scripts.
This commit fixes that and also provides some other relevant information.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
test: ums: Add script for testing UMS gadget operation

This commit adds new test for UMS USB gadget to u-boot mainline tree.
It is similar in operation to the one already available in test/dfu
directory.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Stephen Warren <swarren@nvidia.com>