clk: remove extra ---help--- tags in Kconfig

Sometimes an extraneous "---help---" follows "help". That is probably a
copy&paste error stemming from their inconsistent use. Remove those.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Link: https://lkml.kernel.org/r/20190822093126.594013-1-lkundrak@v3.sk


Signed-off-by: Stephen Boyd <sboyd@kernel.org>