dt-bindings: interrupt-controller: Drop unneeded quotes
Cleanup bindings dropping unneeded quotes. Once all these are fixed,
checking for this can be enabled in yamllint.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230320233928.2920693-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>