doc: boards: ebyte: adopt zephyr:board-supported-hw directive

Supported Features

==================

The ebyte_e73_tbb/nrf52832 board configuration supports the following

hardware features:

+-----------+------------+----------------------+

| Interface | Controller | Driver/Component     |

+===========+============+======================+

| ADC       | on-chip    | adc                  |

+-----------+------------+----------------------+

| CLOCK     | on-chip    | clock_control        |

+-----------+------------+----------------------+

| FLASH     | on-chip    | flash                |

+-----------+------------+----------------------+

| GPIO      | on-chip    | gpio                 |

+-----------+------------+----------------------+

| I2C(M)    | on-chip    | i2c                  |

+-----------+------------+----------------------+

| MPU       | on-chip    | arch/arm             |

+-----------+------------+----------------------+

| NVIC      | on-chip    | arch/arm             |

+-----------+------------+----------------------+

| PWM       | on-chip    | pwm                  |

+-----------+------------+----------------------+

| RADIO     | on-chip    | Bluetooth            |

+-----------+------------+----------------------+

| RTC       | on-chip    | system clock         |

+-----------+------------+----------------------+

| RTT       | Segger     | console              |

+-----------+------------+----------------------+

| SPI(M/S)  | on-chip    | spi                  |

+-----------+------------+----------------------+

| UART      | on-chip    | serial               |

+-----------+------------+----------------------+

| WDT       | on-chip    | watchdog             |

+-----------+------------+----------------------+

Other hardware features are not supported by the Zephyr kernel.

.. zephyr:board-supported-hw::

See `E73-TBB website`_ and `Nordic Semiconductor Infocenter`_

for a complete list of nRF52832 hardware features.