clk: qcom: sm8750: Constify 'qcom_cc_desc' in SM8750 camcc

clk: qcom: sm8750: Constify 'qcom_cc_desc' in SM8750 camcc

'struct qcom_cc_desc' is passed to qcom_cc_map() and
qcom_cc_really_probe() only as pointer to const, so make the memory
const for safety.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Taniya Das <taniya.das@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260128154306.133047-2-krzysztof.kozlowski@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>