Added newly recompiled 8k mode.

Based on 1k mode rev 430.
- Removed fine delay tracking to save resources.
- 4taps
- new PFB from ska-sa mlib devel
- new snap blocks
- new shared bram
- removed snap_xaui and snap_quant to save BRAM
Merge branch 'master' of github.com:ska-sa/kat7_fpga