-Added g_nof_data_per_sync_diff generic;

-Added non-constant data block generation (+-g_nof_data_per_sync_diff
samples per sync) to tb_mmp_st_histogram.vhd;
-Fixed DP RAM -> MM RAM copy address error in mmp_st_histogram;
-Changed RAM block to allow MM write by user in mmp_st_histogram;
-Changed generic map in node_sdp_adc_input_and_timing.
-All test benches pass OK.