ECSPI contorller for iMX53 and iMX6 has few hardware issues
comparing to iMX51.
The change add possibility to detect which controller is used
to apply possible workaround and limitations.
Signed-off-by: NJiada Wang <jiada_wang@mentor.com>
Acked-by: NRob Herring <robh@kernel.org>
Reviewed-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NMark Brown <broonie@kernel.org>