build(config): trim media subsystem & purge legacy DVB/TV/SDR drivers

[azagramac]

🧹 config: Trim multimedia subsystem & purge unused DVB/TV/SDR drivers

Summary

Streamlined kernel multimedia subsystem configuration in config-6.19.14-debian13 by disabling legacy DVB/TDT, satellite, analog TV, FM radio, software-defined radio (SDR), and unneeded video capture drivers.

Retained strict UVC webcam (CONFIG_USB_VIDEO_CLASS=m) and V4L2 camera pipelines required for desktop webcams, streaming tools (OBS Studio), and modern camera sensors.

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🛠️ Changes Breakdown

✂️ Media Subsystem Trimming & Filter Setup

• Enabled strict media filtering: CONFIG_MEDIA_SUPPORT=y and CONFIG_MEDIA_SUPPORT_FILTER=y.
• Fully disabled unused media classes:
  • # CONFIG_MEDIA_ANALOG_TV_SUPPORT is not set
  • # CONFIG_MEDIA_DIGITAL_TV_SUPPORT is not set
  • # CONFIG_MEDIA_RADIO_SUPPORT is not set
  • # CONFIG_MEDIA_SDR_SUPPORT is not set

📡 Full DVB & Satellite Removal

• Purged DVB core framework (# CONFIG_DVB_CORE is not set).
• Removed all DVB-S/S2, DVB-T/T2, and DVB-C demodulators and frontends.
• Stripped RTL2832, RTL2832 SDR, LNB controllers, and satellite tuner drivers.

📹 Capture Devices & Virtual Driver Removal

• Disabled unused USB capture hardware: # CONFIG_VIDEO_USBTV is not set.
• Disabled virtual test drivers: # CONFIG_VIDEO_VIVID is not set (along with VIVID_CEC, VIVID_OSD, V4L2_TPG).

📻 Legacy Audio/Video Decoders & Encoders Stripped

• Removed legacy analog TV audio/video processors and decoders:
  • Audio Decoders: CS3308, CS5345, CS53L32A, MSP3400, TDA7432, TDA9840, TEA6415C, TEA6420, TLV320AIC23B, TVAUDIO, VP27SMPX, WM8739, WM8775.
  • Video Decoders/Encoders: SAA6588, BT819, BT856, KS0127, SAA7110, SAA711X, TVP5150, VPX3220, SAA717X, CX25840, ADV7170, ADV7175, SAA7127, SAA7185, UPD64031A, UPD64083, SAA6752HS, M52790.

🎥 Retained Camera & USB Webcam Pipeline

• Core V4L2 Architecture: Kept CONFIG_MEDIA_CAMERA_SUPPORT=y, CONFIG_VIDEO_DEV=y, CONFIG_VIDEO_V4L2_I2C=y, and CONFIG_VIDEO_V4L2_SUBDEV_API=y.
• USB Webcams: Kept CONFIG_MEDIA_USB_SUPPORT=y, CONFIG_USB_VIDEO_CLASS=m (UVC), and CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y.
• Camera Sensors: Preserved sensors HI556, MT9V011, OV01A10, OV08X40, OV13B10, OV2640, OV2680, OV2740, OV5670, OV5693, OV7251, OV7670, OV8856, OV8865.

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🎯 Rationale & Impact

• Reduced Kernel & Module Bloat: Eliminated dozens of obsolete TV/DVB/SDR kernel modules from the build target.
• Improved Build Speed: Faster kernel compilation by skipping unneeded media driver subdirectories.
• Zero Desktop Regression: USB webcams, virtual cameras (OBS), and modern camera sensors remain fully functional via uvcvideo and v4l2.