arm64: dts: renesas: r8a77965: Move timer node

To preserve alphabetical sort order.

Fixes: 4c529600 ("arm64: dts: renesas: r8a77965: Add R-Car Gen3 thermal support")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>