dt-bindings: mediatek: Add binding for MT6779 SMI

This patch add description for MT6779 SMI.
There are GALS in smi-larb but without clock of GALS alone.

changelog since v2:
Add GALS for mt6779 in smi-common.txt

Signed-off-by: Ming-Fan Chen <ming-fan.chen@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1578465691-30692-3-git-send-email-ming-fan.chen@mediatek.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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

@@ -5,7 +5,7 @@ The hardware block diagram please check bindings/iommu/mediatek,iommu.txt
 Mediatek SMI have two generations of HW architecture, here is the list
 which generation the SoCs use:
 generation 1: mt2701 and mt7623.
-generation 2: mt2712, mt8173 and mt8183.
+generation 2: mt2712, mt6779, mt8173 and mt8183.
 
 There's slight differences between the two SMI, for generation 2, the
 register which control the iommu port is at each larb's register base. But
@@ -18,6 +18,7 @@ Required properties:
 - compatible : must be one of :
 	"mediatek,mt2701-smi-common"
 	"mediatek,mt2712-smi-common"
+	"mediatek,mt6779-smi-common"
 	"mediatek,mt7623-smi-common", "mediatek,mt2701-smi-common"
 	"mediatek,mt8173-smi-common"
 	"mediatek,mt8183-smi-common"
@@ -35,7 +36,7 @@ Required properties:
   and these 2 option clocks for generation 2 smi HW:
   - "gals0": the path0 clock of GALS(Global Async Local Sync).
   - "gals1": the path1 clock of GALS(Global Async Local Sync).
-  Here is the list which has this GALS: mt8183.
+  Here is the list which has this GALS: mt6779 and mt8183.
 
 Example:
 	smi_common: smi@14022000 {

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,mt6779-smi-larb"
 		"mediatek,mt7623-smi-larb", "mediatek,mt2701-smi-larb"
 		"mediatek,mt8173-smi-larb"
 		"mediatek,mt8183-smi-larb"
@@ -21,7 +22,7 @@ Required properties:
   - "gals": the clock for GALS(Global Async Local Sync).
   Here is the list which has this GALS: mt8183.
 
-Required property for mt2701, mt2712 and mt7623:
+Required property for mt2701, mt2712, mt6779 and mt7623:
 - mediatek,larb-id :the hardware id of this larb.
 
 Example: