kintex-7 reference design updated such that it can do grand-master mode (putting the DIO card on the CLB FMC connector and inputting 10 MHz and PPS).

built from commit 5eeb579d in wrpc-sw repo

Otherwise we do twice the same write to memory and we permanently lose one
nrx_avail. This way, after some time minic may drop frames because it will think
its buffer has not enough space (based on nrx_avail value).

Not needed since the time we have a t24p measurement procedure.

Register stores new fields that were added to MCR since MDIO regs can be only
16-bits.

added delta delays in phy output signals to line up with the ch#_rx_rbclk_o assignment (purely necessary for proper simulation only)

when oob.valid, ep_tx_pcs_16bit should (just as ep_tx_psc_8bit) wait for the U_TX_FIFO to empty in order to catch the proper timestamp for the oob signalled packet.

Sometimes *.wb file had to be updated to produce the same result as used till
now. Earlier wbgen2 had a problem accepting _align_ for the first field in a
register. The bug was fixed, but we want to keep the alignment the old way
(already used in the software). Hence I had to delete some of the _align_
directives.

added tx_prbs_sel, sfp_tx_disable, sfp_loss, sfp_tx_fault and full width loopback to MDIO Control register. Be careful: Single bit loopback was relocated to accomodate loopback(2:0)!