ARM: dts: aspeed: bletchley: Disable GPIOV2 pull-down

The external pull-up cannot drive GPIOV2, so disable GPIOV2 internal
pull-down resistor by the request form HW team.

Signed-off-by: Potin Lai <potin.lai.pt@gmail.com>
Reviewed-by: Patrick Williams <patrick@stwcx.xyz>
Link: https://lore.kernel.org/r/20220613095150.21917-3-potin.lai.pt@gmail.com


Signed-off-by: Joel Stanley <joel@jms.id.au>