arm64: dts: allwinner: Pine H64: correctly remove reg_gmac_3v3

There is no "reg_gmac_3v3" device node in sun50i-h6-pine-h64.dts,
although there is "gmac-3v3" with "reg_gmac_3v3" label, so let's assume
author wanted to remove that node.  Delete node via phandle, not via
full node path, to fix this.

Fixes: f33a9117 ("arm64: dts: allwinner: add pineh64 model B")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20240317184130.157695-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>

arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64-model-b.dts

@@ -5,12 +5,12 @@
 
 #include "sun50i-h6-pine-h64.dts"
 
+/delete-node/ &reg_gmac_3v3;
+
 / {
 	model = "Pine H64 model B";
 	compatible = "pine64,pine-h64-model-b", "allwinner,sun50i-h6";
 
-	/delete-node/ reg_gmac_3v3;
-
 	wifi_pwrseq: wifi_pwrseq {
 		compatible = "mmc-pwrseq-simple";
 		reset-gpios = <&r_pio 1 3 GPIO_ACTIVE_LOW>; /* PM3 */