ramips: improve GnuBee Personal Cloud Two support

ramips: improve GnuBee Personal Cloud Two support

Use the generic board detection for the GnuBee Personal Cloud Two
instead of the target specific one as all recent additions are doing.

Fixup the pinmux to set all pins used as GPIO to the function GPIO.
Request pins where used.

Drop the i2c from the dts. There is nothing connected. While at it fix an
indentation issue and use references instead of duplicating the whole
node path.

Use the same switch config as for the GB-PC1 and drop the led trigger for
the not supported IP1001 phy connected to second rgmii.

Fixes: c60a21532bc9 ("ramips: Add support for the GnuBee Personal Cloud Two")
Signed-off-by: Mathias Kresin <dev@kresin.me>