arm64: dts: mediatek: mt7988: add phy calibration efuse subnodes

MT7988 contains buildin mt753x switch which needs calibration data from
efuse.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Link: https://lore.kernel.org/r/20250516180147.10416-9-linux@fw-web.de
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Author: frank-w

arch/arm64/boot/dts/mediatek/mt7988a.dtsi

@@ -663,6 +663,22 @@
 			lvts_calibration: calib@918 {
 				reg = <0x918 0x28>;
 			};
+
+			phy_calibration_p0: calib@940 {
+				reg = <0x940 0x10>;
+			};
+
+			phy_calibration_p1: calib@954 {
+				reg = <0x954 0x10>;
+			};
+
+			phy_calibration_p2: calib@968 {
+				reg = <0x968 0x10>;
+			};
+
+			phy_calibration_p3: calib@97c {
+				reg = <0x97c 0x10>;
+			};
 		};
 
 		clock-controller@15000000 {