clk: renesas: r8a779f0: Add UFS clock

Add the module clock used by the UFS host controller on the Renesas
R-Car S4-8 (R8A779F0) SoC.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20220411124932.3765571-1-yoshihiro.shimoda.uh@renesas.com


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