GPU Overclock: Initial 8064 GPU Overclock to 487 MHz

Signed-off-by: faux123 <reioux@gmail.com>
GPU Overclock: fix missing PORT1 settings for Adren320 (dual ports)

Signed-off-by: faux123 <reioux@gmail.com>
GPU OC: Add 600mhz and 360mhz

Added without updating the board files to keep GCC 4.8.2 compatability

Signed-off-by: Rohan Mathur <rohanmathur34@gmail.com>