ARM: dts: msm: Add support for Tuna GPU

Add the devicetree files for the GPU on Tuna devices.

Change-Id: I3d651d6e665c2fe40dc4e7bced2ea6bd9dbdd185
Signed-off-by: SIVA MULLATI <quic_smullati@quicinc.com>
(cherry picked from commit 934446a6ac)

bindings/adreno.txt

@@ -16,6 +16,7 @@ Required properties:
 			Must include "qcom,adreno-gpu-gen7-3-0" for Parrot target.
 			Must include "qcom,adreno-gpu-gen7-9-0" for Pineapple target.
 			Must include "qcom,adreno-gpu-gen7-9-1" for Pineapple V2 target.
+			Must include "qcom,adreno-gpu-gen8-6-0" for Tuna target.
 - reg:			Specifies the list of register regions for the device.
 - reg-names:		Resource names used for the register regions specified
 			in reg.
@@ -184,6 +185,8 @@ Optional Properties:
 				1: UBWC 1.0
 				2: UBWC 2.0
 				3: UBWC 3.0
+				4: UBWC 4.0
+				5: UBWC 5.0
 				Based on the ubwc mode, program the appropriate bit into
 				certain protected registers and also pass to the user as
 				a property.