arm64: zynqmp: Rename i2c?-gpio to i2c?-gpio-grp

Anything ending with gpio/gpios is taken as gpio phande/description which
is reported as the issue coming from gpio-consumer.yaml schema.
That's why rename the gpio suffix to gpio-grp to avoid name collision.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/407b0b67ba019be5a2073d09d578b381c639cbc6.1703002605.git.michal.simek@amd.com
diff --git a/arch/arm/dts/zynqmp-zc1751-xm015-dc1.dts b/arch/arm/dts/zynqmp-zc1751-xm015-dc1.dts
index e72ed50..27b38e9 100644
--- a/arch/arm/dts/zynqmp-zc1751-xm015-dc1.dts
+++ b/arch/arm/dts/zynqmp-zc1751-xm015-dc1.dts
@@ -148,7 +148,7 @@
 		};
 	};
 
-	pinctrl_i2c1_gpio: i2c1-gpio {
+	pinctrl_i2c1_gpio: i2c1-gpio-grp {
 		mux {
 			groups = "gpio0_36_grp", "gpio0_37_grp";
 			function = "gpio0";