dt-bindings: mediatek: Add bindig for MT7623 IOMMU and SMI

This patch add the binding documentation for the iommu and smi
devices on the MT7623 SoC.
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt

@@ -17,6 +17,7 @@ Required properties:
 - compatible : must be one of :
 	"mediatek,mt2701-smi-common"
 	"mediatek,mt2712-smi-common"
+	"mediatek,mt7623-smi-common", "mediatek,mt2701-smi-common"
 	"mediatek,mt8173-smi-common"
 - reg : the register and size of the SMI block.
 - power-domains : a phandle to the power domain of this local arbiter.

Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt

@@ -6,6 +6,7 @@ Required properties:
 - compatible : must be one of :
 		"mediatek,mt2701-smi-larb"
 		"mediatek,mt2712-smi-larb"
+		"mediatek,mt7623-smi-larb", "mediatek,mt2701-smi-larb"
 		"mediatek,mt8173-smi-larb"
 - reg : the register and size of this local arbiter.
 - mediatek,smi : a phandle to the smi_common node.
@@ -16,7 +17,7 @@ Required properties:
 	    the register.
   - "smi" : It's the clock for transfer data and command.
 
-Required property for mt2701 and mt2712:
+Required property for mt2701, mt2712 and mt7623:
 - mediatek,larb-id :the hardware id of this larb.
 
 Example: