arm64: dts: renesas: white-hawk-cpu: Add overlay for CP97/98

Add an overlay to use test points CP97 and CP98 on the White Hawk CPU
board as keys.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v3:
  - Use lower-case key names in node names,

v2:
  - s/whitehawk/white-hawk/.
1 file changed