The SPI driver framework can handle it automatically in
spi.c:spi_setup():spi_set_cs():gpiod_set_value_cansleep().
Signed-off-by: Shiji Yang <yangshiji66@qq.com>
Link: https://github.com/openwrt/openwrt/pull/16636
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>