def nolr(tile_type):
    '''
    Remove _L or _R suffix tile_type suffix, if present
    Ex: BRAM_INT_INTERFACE_L => BRAM_INT_INTERFACE
    Ex: VBRK => VBRK
    '''
    postfix = tile_type[-2:]
    if postfix in ('_L', '_R'):
        return tile_type[:-2]
    else:
        return tile_type