CIX_MBOX_CHANS
for (i = 0; i < CIX_MBOX_CHANS; i++) {
priv->mbox.num_chans = CIX_MBOX_CHANS;
struct cix_mbox_con_priv con_priv[CIX_MBOX_CHANS];
struct mbox_chan mbox_chans[CIX_MBOX_CHANS];