Added support for both Zynq and MicroBlaze projects
ZC706 runs rx_clk at 250 MHz. ZC702 and ZED run rx_clk at 200 MHz due to slower fabric. The ZC702 and ZED projects need init_user in the boot procedure in order for the HP Ports to work correctly. Both DDS and DMA mode work.
tcl: FCLK2 was modified from 100 MHz to 125 MHz. xdc: rx_clk period constraint was redefined from 8ns (125 MHz) to 4ns (250 MHz)