This patch makes use of the previous patches, which addeddisables outer cache sync in PL310 driver
capability of by adding "arm,io-coherent " properation variant of ARMv7 bus_dma,ty. In addition to
as well as it disables outer cache sync in PL310 driverthe previous patches it was the last bit needed
by addfor enabling "arm,io-coherent" property. All that enablesproper operation of Armada 38x SoCs
performance boost forwith the IO operations on Armada38x SoCscache coherency.