ESP32 wifi driver buffer handling

[HirokiIshiguro]

Describe the bug
Wrong behavior exists in esp8266_driver_2.c esp8266_recv_task() case3 when receiving authentication handshake 5KB data.
recvbuff[recv_count] overflow exists.

System information

• Which hardware board or part numbers? -> RZ/A2M CPU board
• IDE used -> e2 studio
• Operating System [Windows|Linux|MacOS] -> xxx
• Version of Amazon FreeRTOS (run git describe --tags to find it) -> V147
• Project [Custom Application|MQTT|Shadow|Greengrass|OTA|Device Defender|TCP Echo|Sub pub Demo|Simple TCP Server] -> MQTT Echo
• If your project is a Custom Application, please add the relevant code snippet in the section Code to reproduce the bug. -> N/A

Expected behavior
With no wrong behavior.

Screenshots or console output
N/A

To reproduce
N/A

Code to reproduce the bug
The code should be wrapped in the cpp tag in order to be displayed clearly. For example:

esp8266_driver_2.c: L91

    if (recv_count < (sizeof(recvbuff) - 2)) {
        recv_count++;
    }

If the code is longer than 30 lines, GIST is preferred.

Additional context
N/A

Thank you!