dt-bindings: use capital "OR" for multiple licenses in SPDX

Documentation/process/license-rules.rst and checkpatch expect the SPDX
identifier syntax for multiple licenses to use capital "OR". Correct it
to keep consistent format and avoid copy-paste issues.

Correct also the format // -> .* in few Allwinner binding headers as
pointed out by checkpatch:

WARNING: Improper SPDX comment style for 'include/dt-bindings/reset/sun50i-h6-ccu.h', please use '/*' instead

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20230823084540.112602-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Rob Herring <robh@kernel.org>

dt-bindings: Fix typos

Fix typos in Documentation/devicetree/bindings. The changes are in
descriptions or comments where they shouldn't affect functionality.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20230814212822.193684-3-helgaas@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>

dt-bindings: Drop required 'interrupt-parent'

'interrupt-parent' is never required as it can be in a parent node or a
parent node itself can be an interrupt provider. Where exactly it lives is
outside the scope of a binding schema.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Bartosz Golaszewski <brgl@bgdev.pl>
Link: https://lore.kernel.org/r/20220107031905.2406176-1-robh@kernel.org

dt-bindings: mailbox: Convert omap-mailbox.txt binding to YAML

Convert the current OMAP Mailbox binding from text format to YAML
format/DT schema, and delete the legacy text binding file.

The new YAML binding conversion is an updated version compared to
the original. The descriptions for certain properties have been
improved to provide more clarity. Constraints are added to the
properties 'ti,mbox-num-users', 'ti,mbox-num-fifos' and 'interrupts'.
The 'ti,hwmods' is a legacy property and is retained only to reflect
the existing usage on some older OMAP2 and OMAP3 platforms.

All the existing examples have also been updated to reflect the
latest dts nodes (ti,hwmods removed from OMAP4 and AM33xx examples,
and interrupts value updated for AM65x SoCs).

Signed-off-by: Suman Anna <s-anna@ti.com>
[robh: Update ref in ti,omap-remoteproc.yaml]
Link: https://lore.kernel.org/r/20210520234348.4479-1-s-anna@ti.com
Signed-off-by: Rob Herring <robh@kernel.org>