dt-bindings: pwm: renesas-tpu: Correct example TPU register block size

The Timer Pulse Unit on R-Mobile A1 has registers that lie outside the
declared register block.  Enlarge the register block size to fix this.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

Documentation/devicetree/bindings/pwm/renesas,tpu-pwm.txt

@@ -24,6 +24,6 @@ Example: R8A7740 (R-Car A1) TPU controller node
 
 	tpu: pwm@e6600000 {
 		compatible = "renesas,tpu-r8a7740", "renesas,tpu";
-		reg = <0xe6600000 0x100>;
+		reg = <0xe6600000 0x148>;
 		#pwm-cells = <3>;
 	};