ramips: GnuBee Personal Cloud One updates.

ramips: GnuBee Personal Cloud One updates.

    The GnuBee Personal Cloud One crowdfunded on https://www.crowdsupply.com
    It is a low-cost, low-power, network-attached storage device.

    Specifications:
    - SoC: MediaTek MT7621AT
    - RAM: DDR3 512 MB
    - Flash: 32 MB
    - Six SATA ports for 2.5" Drives
    - One USB 3.0
    - Two USB 2.0
    - One micro SDcard
    - Gigabit Ethernet: 1 x WAN and 1 x LAN
    - UART 3.5mm Audio Jack or 3 pins on PCB - 57600 8N1
    - Four GPIOs available on a pin header

    Flash instructions:
    The GnuBee Personal Cloud One ships with libreCMC installed.
    One can upgrade using the webinterface or sysupgrade.

    Das U-Boot has multiple options for recovery or updates including :
    - USB
    - http
    - tftp

    Signed-off-by: L. D. Pinney