ramips: replace pinctrl property names for ipTIME A1004ns

The pinctrl driver had been replaced with the upstream one in b756ea2
("ramips: replace pinctrl property names"), but the initial A1004ns support
patch did not reflect the changes. This commit updates its pinctrl property
names.

Fixes: 9169482 ("ramips: add support for ipTIME A1004ns")
Signed-off-by: Sungbo Eo <mans0n@gorani.run>

target/linux/ramips/dts/mt7620a_iptime_a1004ns.dts

@@ -53,8 +53,8 @@
 
 &state_default {
 	gpio {
-		ralink,group = "i2c", "uartf", "spi refclk";
-		ralink,function = "gpio";
+		groups = "i2c", "uartf", "spi refclk";
+		function = "gpio";
 	};
 };