ARM: dts: rockchip: rename pcfg_pull_default node name on rk3036

Rename pcfg_pull_default node name so that it fits the regex.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20220330133952.1949-2-jbx6244@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3036.dtsi

@@ -614,7 +614,7 @@ gpio2: gpio@20084000 {
 			#interrupt-cells = <2>;
 		};
 
-		pcfg_pull_default: pcfg_pull_default {
+		pcfg_pull_default: pcfg-pull-default {
 			bias-pull-pin-default;
 		};