cti_plat_count_sig_elements
items = cti_plat_count_sig_elements(fwnode, type_name);
nr_filter_sigs = cti_plat_count_sig_elements(fwnode,
nr_sigs_in = cti_plat_count_sig_elements(fwnode, CTI_DT_TRIGIN_SIGS);
nr_sigs_out = cti_plat_count_sig_elements(fwnode, CTI_DT_TRIGOUT_SIGS);