When exporting a DMABuf from a VASurface the user might tell that the surface was allocated with certain fourcc, but the returned VADRMPRIMESurfaceDescriptor migth tell a different fourcc, as in the case or radeonsi driver, for duplicated fourcc, such as YUY2 and YUYV. Originally it was supposed to be a failed exportation. This patch relax this validation by allowing different fourcc. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5760>