LR1121 power correction mechanism

[interfer]

Add Frequency-Dependent Power Correction for LR1121 (Aeronetix 5W)

Summary

This PR introduces a frequency-dependent output power correction mechanism for the Aeronetix LR1121 5W target to improve TX's power curve. The driver now applies a correction (in dBm) to the requested output power based on the current transmission frequency, using a table of integer correction values defined in the hardware configuration JSON.

NOTE: Feature supported across all Aeronetix LR-based targets but currently safely tested only on Aeronetix_ESP32_LR1121_5W_TX_via_UART target

Key Changes

• New freq_power_table in Hardware JSON:
  The hardware configuration now includes a freq_power_table array, mapping frequency (MHz) to integer dBm correction values.
  Example:

  "freq_power_table": [
      [150, -3],
      [160, -3],
      ...
      [750, 0]
  ]

• Driver Support for Power Correction:

  • The LR1121 driver loads the freq_power_table at startup.
  • During transmission, the driver applies the appropriate correction (with linear interpolation between table points) to the requested output power.
  • All calculations are performed using integer math, as the hardware only supports integer dBm steps.

• Debug Output:

  • The driver logs the correction process, including the frequency, base power, correction applied, and final power setting.

• Backward Compatibility:

  • If no freq_power_table is present, the driver defaults to no correction.
  • If "apply_power_correction" set to false , correction won't be used as well.

• Improved Output Power Accuracy:
  The LR1121’s output power varies with frequency. This mechanism ensures more consistent and accurate output power across the supported frequency range, improving performance and regulatory compliance.