add ESP32-P4 ECO6 support
ESP32-P4 ECO6 support (#70) * changes p4eco6 * remove CHIP_MAGIC_VALUES * working P4 ECO6 detection * update stubs * detect guru meditiation * add drain input buffer in "command" * update P4 rev3 bootloader * v3.3.0
ESP32-P4 ECO6 support (#70) * changes p4eco6 * remove CHIP_MAGIC_VALUES * working P4 ECO6 detection * update stubs * detect guru meditiation * add drain input buffer in "command" * update P4 rev3 bootloader * v3.3.0