gpu: fix dualports for Adreno320

This is derived from the original patch by @faux123
https://github.com/faux123/mako/commit/8f54954fb551478713d794b6e3d2da4fcbf7bd0e

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
gpu: increase bus bandwidth for high/max vectors

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>