MVNETA_DA_FILT_OTH_MCAST
mvreg_write(pp, MVNETA_DA_FILT_OTH_MCAST + offset, val);
omc_table_reg = mvreg_read(pp, MVNETA_DA_FILT_OTH_MCAST + tbl_offset);
mvreg_write(pp, MVNETA_DA_FILT_OTH_MCAST + tbl_offset, omc_table_reg);