* Update cn0363 spi engine
I replaced the SPI Engine connections in the cn0363_bd.tcl with the
spi_engine_create procedure found in the spi_engine.tcl script. Through
these changes, a more generic instantiation for the spi_engine can be
achieved. I updated the system_constr.xdc file and
created the cn0363_pmod.txt file.
Signed-off-by: Ioan-daniel Pop <Pop.Ioan-daniel@analog.com>