clk: qcom: gcc-sc8280xp: fix runtime PM imbalance on probe errors

Make sure to decrement the runtime PM usage count before returning in
case RCG dynamic frequency switch initialisation fails.

Fixes: 2a541abd ("clk: qcom: gcc-sc8280xp: Add runtime PM")
Cc: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20230718132902.21430-5-johan+linaro@kernel.org


Signed-off-by: Bjorn Andersson <andersson@kernel.org>