spi: npcm-pspi: improve spi transfer performance
Improving spi 8 bit per word mode transfer performance by using 16 bit per word transfer and receive when the data length is even and larger than one. Signed-off-by: Tomer Maimon <tmaimon77@gmail.com> Link: https://lore.kernel.org/r/20200115162301.235926-3-tmaimon77@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>
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