ARM: shmobile: r8a7794: add GPIO clocks

Describe the GPIO clocks in the R8A7794 device tree.

Based on the original patch by Koji Matsuoka <koji.matsuoka.xm@renesas.com>.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7794.dtsi

@@ -749,16 +749,22 @@ R8A7794_CLK_VIN1 R8A7794_CLK_VIN0 R8A7794_CLK_ETHER
 		mstp9_clks: mstp9_clks@e6150994 {
 			compatible = "renesas,r8a7794-mstp-clocks", "renesas,cpg-mstp-clocks";
 			reg = <0 0xe6150994 0 4>, <0 0xe61509a4 0 4>;
-			clocks = <&cpg_clocks R8A7794_CLK_QSPI>, <&hp_clk>, <&hp_clk>,
+			clocks = <&cp_clk>, <&cp_clk>, <&cp_clk>, <&cp_clk>,
+				 <&cp_clk>, <&cp_clk>, <&cp_clk>,
+				 <&cpg_clocks R8A7794_CLK_QSPI>, <&hp_clk>, <&hp_clk>,
 				 <&hp_clk>, <&hp_clk>, <&hp_clk>, <&hp_clk>;
 			#clock-cells = <1>;
-			clock-indices = <
-				R8A7794_CLK_QSPI_MOD R8A7794_CLK_I2C5 R8A7794_CLK_I2C4
-				R8A7794_CLK_I2C3 R8A7794_CLK_I2C2 R8A7794_CLK_I2C1
-				R8A7794_CLK_I2C0
-			>;
+			clock-indices = <R8A7794_CLK_GPIO6 R8A7794_CLK_GPIO5
+					 R8A7794_CLK_GPIO4 R8A7794_CLK_GPIO3
+					 R8A7794_CLK_GPIO2 R8A7794_CLK_GPIO1
+					 R8A7794_CLK_GPIO0 R8A7794_CLK_QSPI_MOD
+					 R8A7794_CLK_I2C5 R8A7794_CLK_I2C4
+					 R8A7794_CLK_I2C3 R8A7794_CLK_I2C2
+					 R8A7794_CLK_I2C1 R8A7794_CLK_I2C0>;
 			clock-output-names =
-				"qspi_mod", "i2c5", "i2c4", "i2c3", "i2c2", "i2c1", "i2c0";
+				"gpio6", "gpio5", "gpio4", "gpio3", "gpio2",
+				"gpio1", "gpio0", "qspi_mod",
+				"i2c5", "i2c4", "i2c3", "i2c2", "i2c1", "i2c0";
 		};
 		mstp11_clks: mstp11_clks@e615099c {
 			compatible = "renesas,r8a7794-mstp-clocks", "renesas,cpg-mstp-clocks";