package/freescale-imx/imx-gpu-g2d: bump to version 6.4.0.p1.0

Make the package available on AArch64 now that it is supported, and
add hashes for the license files.

Signed-off-by: Refik Tuzakli <tuzakli.refik@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>