Change to use SPI_CS_HIGH to support spi CS polarity setting
for chips support enhance_timing.

Signed-off-by: Luhua Xu <luhua.xu@mediatek.com>
Link: https://lore.kernel.org/r/1574053037-26721-2-git-send-email-luhua.xu@mediatek.com


Signed-off-by: Mark Brown <broonie@kernel.org>