ARM: dts: mediatek: mt7623: fix efuse fallback compatible

ARM: dts: mediatek: mt7623: fix efuse fallback compatible

Fix following validation error:
arch/arm/boot/dts/mediatek/mt7623a-rfb-emmc.dtb: efuse@10206000: compatible: 'oneOf' conditional failed, one must be fixed:
        ['mediatek,mt7623-efuse', 'mediatek,mt8173-efuse'] is too long
        'mediatek,mt8173-efuse' was expected
        'mediatek,efuse' was expected
        from schema $id: http://devicetree.org/schemas/nvmem/mediatek,efuse.yaml#
arch/arm/boot/dts/mediatek/mt7623a-rfb-emmc.dtb: efuse@10206000: Unevaluated properties are not allowed ('compatible' was unexpected)
        from schema $id: http://devicetree.org/schemas/nvmem/mediatek,efuse.yaml#

Fixes: 43c7a91b4b3a ("arm: dts: mt7623: add efuse nodes to the mt7623.dtsi file")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>