dual_channel_active
drc_chan = dual_channel_active(ddrcsr) ? 1 : 0;
drc_chan = dual_channel_active(ddrcsr);
drc_chan = dual_channel_active(drc, dev_idx);
drc_chan = dual_channel_active(drc, dev_idx);
unsigned nr_chans = dual_channel_active(drc) + 1;
nr_chans = dual_channel_active(drc) + 1;
chans = dual_channel_active(mch_window) + 1;