remove VideoInSoC/VideoOutSoC and create FramebufferSoc/VideomixerSoC
remove VideoInSoC/VideoOutSoC and create FramebufferSoc/VideomixerSoC

cr1901/HDMI2USB-litex-firmware,cr1901/HDMI2USB-litex-firmware,mithro/HDMI2USB-litex-firmware,mithro/HDMI2USB-litex-firmware,mithro/HDMI2USB-litex-firmware,cr1901/HDMI2USB-litex-firmware,mithro/HDMI2USB-litex-firmware,cr1901/HDMI2USB-litex-firmware