dt-bindings: arm: apple: Add A8 devices

This adds the following apple,t7000 based platforms:

 - iPhone 6
 - iPhone 6 Plus
 - iPad mini 4
 - iPod touch 6
 - Apple TV HD

The remaining HomePod is not supported as part of this patch.

Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Nick Chan <towinchenmi@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Hector Martin <marcan@marcan.st>

Documentation/devicetree/bindings/arm/apple.yaml

@@ -19,6 +19,14 @@ description: |
   - iPad mini 2
   - iPad mini 3
 
+  Devices based on the "A8" SoC:
+
+  - iPhone 6
+  - iPhone 6 Plus
+  - iPad mini 4
+  - iPod touch 6
+  - Apple TV HD
+
   Devices based on the "M1" SoC:
 
   - Mac mini (M1, 2020)
@@ -89,6 +97,18 @@ properties:
           - const: apple,s5l8960x
           - const: apple,arm-platform
 
+      - description: Apple A8 SoC based platforms
+        items:
+          - enum:
+              - apple,j42d # Apple TV HD
+              - apple,j96  # iPad mini 4 (Wi-Fi)
+              - apple,j97  # iPad mini 4 (Cellular)
+              - apple,n56  # iPhone 6 Plus
+              - apple,n61  # iPhone 6
+              - apple,n102 # iPod touch 6
+          - const: apple,t7000
+          - const: apple,arm-platform
+
       - description: Apple M1 SoC based platforms
         items:
           - enum: