dt-bindings: arm: amazon: rename al,alpine DT binding to amazon,al

As preparation to add device tree binding for Amazon's Annapurna Labs
Alpine v3 support. Rename al,alpine DT binding to amazon,al.

Link: https://lore.kernel.org/r/20200724132654.16549-2-hhhawa@amazon.comSigned-off-by: Hanna Hawa <hhhawa@amazon.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Documentation/devicetree/bindings/arm/al,alpine.yaml → Documentation/devicetree/bindings/arm/amazon,al.yaml

 # SPDX-License-Identifier: GPL-2.0
 %YAML 1.2
 ---
-$id: http://devicetree.org/schemas/arm/al,alpine.yaml#
+$id: http://devicetree.org/schemas/arm/amazon,al.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Annapurna Labs Alpine Platform Device Tree Bindings
+title: Amazon's Annapurna Labs Alpine Platform Device Tree Bindings
 
 maintainers:
   - Tsahee Zidenberg <tsahee@annapurnalabs.com>