arm64: dts: renesas: white-hawk: cp55/57/58: Add overlay for PWM

Add an overlay to use PWM0, PWM8, and PWM9 on test points CP55, CP57,
resp. CP58 on the White Hawk BreakOut Board.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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v2:
  - s/whitehawk/white-hawk/.
1 file changed