dt-bindings: clock: mediatek: add missing required #reset-cells

All ethsys, pciesys and ssusbsys internally include reset controller, so
explicitly add back these missing cell definitions to related bindings
and examples.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: linux-clk@vger.kernel.org
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

Documentation/devicetree/bindings/arm/mediatek/mediatek,ethsys.txt

@@ -9,6 +9,7 @@ Required Properties:
 	- "mediatek,mt2701-ethsys", "syscon"
 	- "mediatek,mt7622-ethsys", "syscon"
 - #clock-cells: Must be 1
+- #reset-cells: Must be 1
 
 The ethsys controller uses the common clk binding from
 Documentation/devicetree/bindings/clock/clock-bindings.txt

Documentation/devicetree/bindings/arm/mediatek/mediatek,pciesys.txt

@@ -8,6 +8,7 @@ Required Properties:
 - compatible: Should be:
 	- "mediatek,mt7622-pciesys", "syscon"
 - #clock-cells: Must be 1
+- #reset-cells: Must be 1
 
 The PCIESYS controller uses the common clk binding from
 Documentation/devicetree/bindings/clock/clock-bindings.txt
@@ -19,4 +20,5 @@ pciesys: pciesys@1a100800 {
 	compatible = "mediatek,mt7622-pciesys", "syscon";
 	reg = <0 0x1a100800 0 0x1000>;
 	#clock-cells = <1>;
+	#reset-cells = <1>;
 };

Documentation/devicetree/bindings/arm/mediatek/mediatek,ssusbsys.txt

@@ -8,6 +8,7 @@ Required Properties:
 - compatible: Should be:
 	- "mediatek,mt7622-ssusbsys", "syscon"
 - #clock-cells: Must be 1
+- #reset-cells: Must be 1
 
 The SSUSBSYS controller uses the common clk binding from
 Documentation/devicetree/bindings/clock/clock-bindings.txt
@@ -19,4 +20,5 @@ ssusbsys: ssusbsys@1a000000 {
 	compatible = "mediatek,mt7622-ssusbsys", "syscon";
 	reg = <0 0x1a000000 0 0x1000>;
 	#clock-cells = <1>;
+	#reset-cells = <1>;
 };