misc: pch_phub: Read prefetch value from device tree if passed
The default prefetch value for the eg20t device is hard coded to 0x000affaa. Add support for an alternative to be read from DT if available Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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aeb83d70
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