dt-bindings: pinctrl: qcom,sm6125-tlmm: minor style cleanups

dt-bindings: pinctrl: qcom,sm6125-tlmm: minor style cleanups

Drop "binding" from description (and align it with other Qualcomm
pinctrl bindings), drop redundant minItems, use double quotes
consistently, drop redundant quotes and rename file to match compatible
(to match coding convention).

Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20221017230012.47878-24-krzysztof.kozlowski@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>