clk: renesas: rcar-gen3-cpg: Pass mode pins to rcar_gen3_cpg_init()

Pass the mode pin states from the SoC-specific CPG/MSSR driver to the
R-Car Gen3 CPG driver core, as their state will be needed to make some
core clock configuration decisions.

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