ARM: dts: aspeed: bletchley: enable ehci0 device node

Enable ehci0 node for USB2 host feature

Signed-off-by: Potin Lai <potin.lai.pt@gmail.com>
Reviewed-by: Patrick Williams <patrick@stwcx.xyz>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20220509151118.4899-2-potin.lai.pt@gmail.com


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