clk: renesas: r8a779g0: Add ISPCS clocks

Add the ISPCS0 and ISPCS1  module clocks, which are used by the ISPCS
modules on the Renesas R-Car V4H (R8A779G0) SoC.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230211143655.3809756-3-niklas.soderlund+renesas@ragnatech.se


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