No, it only means that Rockchips (or one of their customers) ships a kernel with a a driver for a Marvell wireless devices (presumably now made by NXP), for which Marvell claims to own the copyright and gives permission under GPL.
Assuming that the license text is correct, Marvell or NXP would have been in their full rights to provide the same source code to some users under the GPLv2 for use in a Linux driver, and to other users under a different license.
Another possibility is that Marvell themselves licensed the supplicant code from someone else and replaced the copyright information when publishing it together with their driver.
Yeah, but I think this an avenue we should peruse. If by any chance they copied anything from rk3399-linux, the whole thing should be released under GPLv2.
Assuming that the license text is correct, Marvell or NXP would have been in their full rights to provide the same source code to some users under the GPLv2 for use in a Linux driver, and to other users under a different license.
Another possibility is that Marvell themselves licensed the supplicant code from someone else and replaced the copyright information when publishing it together with their driver.