fixing handling of ndi/first_tx in dci. commenting out corner case of missed ACK, this needs to be done better

we can compute CCE_max_used_index out of the loop.

get_nCCE returns the number of available CCEs.

We can put the CCEs numbers [ 0 .. get_nCCE-1 ],
so we need to use <, not <=.

config 4 tested with Amarisoft

those popped up thanks to previous commit

```-------------------------------------------------------
bug 37

Ttile:
Sending side is as follows.
rar[3] = (((mcs&0x7)<<5)) | ((TPC&7)<<2) | ((ULdelay&1)<<1) | (cqireq&1);
So, 2 bit shift looks correct.

Bug Location:
ulsch->harq_processes[harq_pid]->TPC = (rar[3]>>3)&7;//rar->TPC;
```

-------------------------------------------------------

In 20MHz the UE didn't do any uplink granted by DCI0.
It was replying to RAR, so uplink decoding was okay.

Turns out the DCI0 structure for TDD was wrong.