arm64: dts: renesas: r8a779h0: Add PWM device nodes

Add device nodes for the PWM timers on the Renesas R-Car V4M (R8A779H0)
SoC.

Signed-off-by: Khanh Le <khanh.le.xr@renesas.com>
[wsa: rebased, dropped TPU part to be upstreamed seperately]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20240725194906.14644-11-wsa+renesas@sang-engineering.com


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