spi: pl022: update description of internal_cs_control()

spi: pl022: update description of internal_cs_control()

The arguments of internal_cs_control() was changed, but its description
was not updated. Update the description to match the expected arguments.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202312151816.munFeE4L-lkp@intel.com/
Signed-off-by: Nam Cao <namcao@linutronix.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://msgid.link/r/4036d8d5845c04179f330f83e825a3921aa50c5a.1702639801.git.namcao@linutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>