usb: ohci: Add proper cache flushing / invalidating for non cache coherent cpus
Add proper cache flushing / invalidating for non cache coherent cpus, for now only enable this for new (driver-model) usb code to avoid regressions. Signed-off-by: NHans de Goede <hdegoede@redhat.com> Reviewed-by: NMarek Vasut <marex@denx.de>
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