radeon_gpu_i2c_cmd
radeon_gpu_i2c_cmd(0x10, 0x96, 0x1e, 0xdd);
radeon_gpu_i2c_cmd(0x10, 0x96, 0x1f, 0xd0);
status_t radeon_gpu_i2c_cmd(uint16 slaveAddr, uint16 lineNumber, uint8 offset,