staging:rtl8192u: Add SPDX-License-Identifier tag - Style

Add the missing SPDX-License-Identifier tag to clear the checkpatch
issue. This is a coding style change which should not impact runtime
code execution.

Signed-off-by: John Whitmore <johnfwhitmore@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed