Describe TPU in the R8A779{7|8}0 device trees.

Based on the original (and large) patches by Vladimir Barinov.

Signed-off-by: Vladimir Barinov <redacted>
Signed-off-by: Sergei Shtylyov <redacted>

---
This patch is against the 'renesas-devel-20180921-v4.19-rc4' branch of
Simon Horman's 'renesas.git' repo.

Changes in version 2:
- fixed up the size cells in the "regs" properties;
- fixed up the "#pwm-cells" properties;
- fixed up the R8A77980's "compatible" property.

 arch/arm64/boot/dts/renesas/r8a77970.dtsi |    8 ++++++++
 arch/arm64/boot/dts/renesas/r8a77980.dtsi |    9 +++++++++
 2 files changed, 17 insertions(+)

Index: renesas/arch/arm64/boot/dts/renesas/r8a77970.dtsi
===================================================================

--- renesas.orig/arch/arm64/boot/dts/renesas/r8a77970.dtsi
+++ renesas/arch/arm64/boot/dts/renesas/r8a77970.dtsi

@@ -614,6 +614,14 @@
 			status = "disabled";
 		};
 
+		tpu: pwm@e6e80000 {
+			compatible = "renesas,tpu-r8a77970", "renesas,tpu";
+			reg = <0 0xe6e80000 0 0x148>;
+			clocks = <&cpg CPG_MOD 304>;
+			power-domains = <&sysc R8A77970_PD_ALWAYS_ON>;
+			#pwm-cells = <3>;
+			status = "disabled";
+		};
 
 		vin0: video@e6ef0000 {
 			compatible = "renesas,vin-r8a77970";

Index: renesas/arch/arm64/boot/dts/renesas/r8a77980.dtsi
===================================================================

--- renesas.orig/arch/arm64/boot/dts/renesas/r8a77980.dtsi
+++ renesas/arch/arm64/boot/dts/renesas/r8a77980.dtsi

@@ -666,6 +666,15 @@
 			status = "disabled";
 		};
 
+		tpu: pwm@e6e80000 {
+			compatible = "renesas,tpu-r8a77980", "renesas,tpu";
+			reg = <0 0xe6e80000 0 0x148>;
+			clocks = <&cpg CPG_MOD 304>;
+			power-domains = <&sysc R8A77980_PD_ALWAYS_ON>;
+			#pwm-cells = <3>;
+			status = "disabled";
+		};
+
 		vin0: video@e6ef0000 {
 			compatible = "renesas,vin-r8a77980";
 			reg = <0 0xe6ef0000 0 0x1000>;