Interesting...
I don't have an /opt/freescale/pkgs (actually /opt is empty)
Also - L2.6.35_11.09.01_ER_images_MX5X only has amd-gpu-x11-bin-mx51-11.05.01.tar.gz
But I just noticed and downloaded L2.6.35_MX53_201112_Patches.tar.gz (hidden under patches) which does contain:
L2.6.35_MX53_201112_Patches/amd-gpu-x11-bin-mx51-11.09.01_201112.tar.gz
L2.6.35_MX53_201112_Patches/amd-gpu-bin-mx51-11.09.01_201112.tar.gz
so - off to explore these new packages.