xc7/utils: modified add_pack_patterns script to work with new IOB33s
xc7/utils: modified add_pack_patterns script to work with new IOB33s

Signed-off-by: Alessandro Comodi <622632e70fd6771cf2cd943f69e5e51ab66adef8@antmicro.com>

SymbiFlow/symbiflow-arch-defs,SymbiFlow/symbiflow-arch-defs