spi: simplify getting .drvdata
We should get drvdata from struct device directly. Going via platform_device is an unneeded step back and forth. Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: NMichal Simek <michal.simek@xilinx.com> Signed-off-by: NMark Brown <broonie@kernel.org>
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