arm64: dts: socfpga: stratix10: align pincfg nodes with bindings

pinctrl-single bindings require pin configuration node names to match
certain patterns:

  socfpga_stratix10_socdk.dtb: pinctrl@ffd13000: 'i2c1-pmx-func', 'i2c1-pmx-func-gpio'
    do not match any of the regexes: '-pins(-[0-9]+)?$|-pin$', 'pinctrl-[0-9]+'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>

arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts

@@ -66,14 +66,14 @@ sdmmca-ecc@ff8c8c00 {
 };
 
 &pinctrl0 {
-	i2c1_pmx_func: i2c1-pmx-func {
+	i2c1_pmx_func: i2c1-pmx-func-pins {
 		pinctrl-single,pins = <
 			0x78   0x4   /* I2C1_SDA (IO6-B) PIN30SEL) */
 			0x7c   0x4   /* I2C1_SCL (IO7-B) PIN31SEL */
 		>;
 	};
 
-	i2c1_pmx_func_gpio: i2c1-pmx-func-gpio {
+	i2c1_pmx_func_gpio: i2c1-pmx-func-gpio-pins {
 		pinctrl-single,pins = <
 			0x78   0x8   /* I2C1_SDA (IO6-B) PIN30SEL) */
 			0x7c   0x8   /* I2C1_SCL (IO7-B) PIN31SEL */