AVM_HDLC_1
u32 idx = channel == 2 ? AVM_HDLC_2 : AVM_HDLC_1;
outl(channel == 2 ? AVM_HDLC_2 : AVM_HDLC_1, addr + CHIP_INDEX);
outl(bch->nr == 2 ? AVM_HDLC_2 : AVM_HDLC_1, fc->addr);
outl(AVM_HDLC_1, fc->addr + CHIP_INDEX);