clk: renesas: r8a774b1: Add TMU clock

This patch adds the TMU clocks to the R8A774B1 SoC.

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Link: https://lore.kernel.org/r/1569249688-15821-1-git-send-email-biju.das@bp.renesas.com


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