The MSSR clock definition for I2C5 was missing.  Add it.
Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230328033902.830269-1-nikita.yoush@cogentembedded.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>