Changed the default AD9081 profile for VCK190

* RX_mode=27, L=4, M=4, S=2, NP=12, Lane_rate=12.375 GHz
* TX_mode=23, L=4, M=4, S=2, NP=12, Lane_rate=12.375 GHz
* Ref_clk=375 MHz, Device_clk=125 MHz

ad4858_fmcz: add support for zcu102

The LVDS interface requires digital(delay) tuning by software.

util_do_ram: Fix Rx path for interrupted transfers

When capture length is not programmed the DMA will interrupt the
transfer once it received all the samples he was set in its descriptor,
this case must be handled by resetting the read process and returning
an end of transfer (eot) to the data offload control logic.

pluto: Fix dunf connection

USDRX1 ulstrasound hdl reference design

FMCOMMS7 hdl reference design

FMCJESDADC1 hdl reference design for ZCU102 carrier

FMCJESDADC1 hdl reference design for A10SOC carrier

Paul's attempt to add scatter-gather support for ADI AXI_DMAC IP

hdl_2019_r1 release tag