clk: qcom: camcc-sm6350: Make camcc_sm6350_hws static

There's no reason for it not to be static, and some compilers don't
like not it being that way. Make it so.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 80f5451d ("clk: qcom: Add camera clock controller driver for SM6350")
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230107120434.1902666-1-konrad.dybcio@linaro.org