Sorts header inclusions.  ASCII value of 'r' is less than 's'.
Signed-off-by: NTzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20201224100607.3006171-2-tzungbi@google.comSigned-off-by: NMark Brown <broonie@kernel.org>