clk: renesas: cpg-mssr: Fix formatting issues for 'smstpcr_saved's documentation

Fixes the following W=1 kernel build warning(s):

 drivers/clk/renesas/renesas-cpg-mssr.c:168: warning: Function parameter or member 'smstpcr_saved' not described in 'cpg_mssr_priv'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20210126124540.3320214-12-lee.jones@linaro.org


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>