riscv: dts: allwinner: rename devterm i2c-gpio node to comply with binding

The i2c controller binding does not permit permit the node name to
contain "gpio", resulting in two warnings:

i2c-gpio-0 (i2c-gpio): $nodename:0: 'i2c-gpio-0' does not match '^i2c(@.+|-[a-z0-9]+)?$'
i2c-gpio-0 (i2c-gpio): Unevaluated properties are not allowed ('#address-cells', '#size-cells', 'adc@54' were unexpected)

Drop it to satisfy dtbs_check.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20250909-frown-wrinkle-f16df243a970@spud
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

Author: ConchuOD

arch/riscv/boot/dts/allwinner/sun20i-d1-devterm-v3.14.dts

@@ -17,7 +17,7 @@
 		#cooling-cells = <2>;
 	};
 
-	i2c-gpio-0 {
+	i2c-0 {
 		compatible = "i2c-gpio";
 		sda-gpios = <&pio 3 14 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>; /* PD14/GPIO44 */
 		scl-gpios = <&pio 3 15 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>; /* PD15/GPIO45 */