clk: qcom: gcc-qcs404: Use floor ops for sdcc clks

Update the gcc qcs404 clock driver to use floor ops for sdcc clocks. As
disuccsed in [1] it is good idea to use floor ops for sdcc clocks as we
dont want the clock rates to do round up.

[1]: https://lore.kernel.org/linux-arm-msm/20190830195142.103564-1-swboyd@chromium.org/

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lkml.kernel.org/r/20190906045659.20621-1-vkoul@kernel.org
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>