tw2880的初始化配置，linux下的驱动程序。-tw2880 initilize,linux driver.

Advanced Multi-Channel HD Display/Record/Playback Controller IC for Next Generation 16-Channel DVR Applications

Altera的EP2C5Q208C8芯片上跑通，后端接tw2880芯片输出上TV，进行验证无误。 i_pclk是27Mhz输入时钟，o_pclk是27Mhz输出时钟；i_clkin是笔者用的开发板50Mhz时钟，只用于生成稳定的复位信号。-Ran on Altera' s EP2C5Q208C8 chip pass, after termination tw2880 chip output on the TV, to verify correct. i_pclk 27Mhz in