clk: renesas: r9a09g047: Add support for DSI clocks and resets

clk: renesas: r9a09g047: Add support for DSI clocks and resets

Add definitions for DSI clocks and resets on the R9A09G047 cpg driver
to enable proper initialization and control of the DSI hardware.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://patch.msgid.link/21ac6da825e8fad0b0a9d37d6daa955b0d23ce07.1775636898.git.tommaso.merciai.xr@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>