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>