dt-bindings: arm: apple: Add t6000/t6001 MacBook Pro 14/16" compatibles

This adds the initial apple,t6000 platforms:

- apple,j314s - MacBook Pro (14-inch, M1 Pro, 2021)
- apple,j316s - MacBook Pro (16-inch, M1 Pro, 2021)

And the initial apple,t6001 platforms:

- apple,j314c - MacBook Pro (14-inch, M1 Max, 2021)
- apple,j316c - MacBook Pro (16-inch, M1 Max, 2021)

Reviewed-by: Mark Kettenis <kettenis@openbsd.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>