dt-bindings: arm: mediatek: add support for MT7622 BPI-R64 and MT7629 RFB

Update binding document for MT7622 BPI-R64 and MT7629 reference board.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

Documentation/devicetree/bindings/arm/mediatek.txt

@@ -16,6 +16,7 @@ compatible: Must contain one of
    "mediatek,mt6797"
    "mediatek,mt7622"
    "mediatek,mt7623"
+   "mediatek,mt7629"
    "mediatek,mt8127"
    "mediatek,mt8135"
    "mediatek,mt8173"
@@ -57,6 +58,9 @@ Supported boards:
 - Reference board variant 1 for MT7622:
     Required root node properties:
       - compatible = "mediatek,mt7622-rfb1", "mediatek,mt7622";
+- Bananapi BPI-R64 for MT7622:
+    Required root node properties:
+      - compatible = "bananapi,bpi-r64", "mediatek,mt7622";
 - Reference board for MT7623a with eMMC:
     Required root node properties:
       - compatible = "mediatek,mt7623a-rfb-emmc", "mediatek,mt7623";
@@ -68,6 +72,9 @@ Supported boards:
       - compatible = "mediatek,mt7623n-rfb-emmc", "mediatek,mt7623";
 - Bananapi BPI-R2 board:
       - compatible = "bananapi,bpi-r2", "mediatek,mt7623";
+- Reference board for MT7629:
+    Required root node properties:
+      - compatible = "mediatek,mt7629-rfb", "mediatek,mt7629";
 - MTK mt8127 tablet moose EVB:
     Required root node properties:
       - compatible = "mediatek,mt8127-moose", "mediatek,mt8127";