ARM: dts: aspeed: Enable Dual SPI RX transfers

All these controllers support at least Dual SPI. Update the DTs.

Reviewed-by: Joel Stanley <joel@jms.id.au>
Tested-by: Joel Stanley <joel@jms.id.au>
Tested-by: Tao Ren <rentao.bupt@gmail.com>
Tested-by: Jae Hyun Yoo <quic_jaehyoo@quicinc.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Link: https://lore.kernel.org/r/20220509175616.1089346-10-clg@kaod.org


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