daq2_fmc: Cosmetic changes

Delete trailing whitespaces, no functional changes.
daq2_kc705: Instantiate dmafifo module
daq2_kc705: Fix constraint file

I/O standard for trig_[p/n] is LVDS_25
daq2_fmc: Update interrupts

Update interrupts for ZC706 and KC705 carrier.
kc705_base: Define sys_addr_mem_seg for dmafifo