ARM: dts: aspeed: bletchley: Bind presence-sledX pins via gpio-keys

Bind presence-sledX pins via gpio-keys driver to monitor and export
GPIO pin values on DBUS using phosphor-gpio-presence service.

Signed-off-by: Potin Lai <potin.lai.pt@gmail.com>
Reviewed-by: Patrick Williams <patrick@stwcx.xyz>
Link: https://lore.kernel.org/r/20220613095150.21917-4-potin.lai.pt@gmail.com


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