soc: amlogic: clk-measure: Optimize the memory size of clk-measure

soc: amlogic: clk-measure: Optimize the memory size of clk-measure

Drop "CLK_MSR_MAX" and replace it with adding a member "msr_count" in
the structure to specify the count of msr_id.

Mark the table of msr_id as const.

Signed-off-by: Chuan Liu <chuan.liu@amlogic.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20250205-optimize_memory_size_of_clk_measure-v2-1-4f546053495d@amlogic.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>