dt-bindings: clocks: qcom: rpmcc: add LN_BB_CLK_PIN clocks

Add pin-controlled Low-Noise BB clock definition.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221209164855.128798-2-dmitry.baryshkov@linaro.org