dt-bindings: nvmem: mediatek: add support for MediaTek MT7623 and MT7622 SoC

This updates dt-binding documentation for MediaTek MT7622 and
MT7623 SoC. For the both SoCs supported all rely on the fallback
binding of the generic case with "mediatek,efuse".

Signed-off-by: Sean Wang <[e-mail]>
Signed-off-by: Andrew-CT Chen <[e-mail]>
Reviewed-by: Matthias Brugger <[e-mail]>
Signed-off-by: Rob Herring <[e-mail]>

Documentation/devicetree/bindings/nvmem/mtk-efuse.txt

···
 This binding is intended to represent MTK-EFUSE which is found in most Mediatek SOCs.
 
 Required properties:
-- compatible: should be "mediatek,mt8173-efuse" or "mediatek,efuse"
+- compatible: should be
+	      "mediatek,mt7622-efuse", "mediatek,efuse": for MT7622
+	      "mediatek,mt7623-efuse", "mediatek,efuse": for MT7623
+	      "mediatek,mt8173-efuse" or "mediatek,efuse": for MT8173
 - reg: Should contain registers location and length
 
 = Data cells =