Revert AXI bus signals back to upper case on SPI Engine Offload IP,
changed on e2ca5a991a.
Fixup signals from sd*_data_* to sd*_* for spi_engine_ctrl interface.
Non-breaking mistake, but added warnings to the IP.
Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Use tcl script instead of static xmls for the interface.
Easier to maintain and are not gitignored.
Rename spi_master to spi_engine because every interface should be
prefixed by the IP name; in this case, spi_engine.
Also, remove interface/*.sv files on make clean and git ignore them.
Signed-off-by: Jorge Marques <jorge.marques@analog.com>