iq2000 port : bit rot already started.

[Kazu Hirata]

Hi,

I just want to let you know that the bit rot of iq2000 seems to have
started.  We really need a maintainer.  Otherwise, we need to obsolete
the port.

.../iq2000/iq2000.h:206:9: attempt to use poisoned "MAX_INT_TYPE_SIZE"
.../iq2000/iq2000.h:224:29: attempt to use poisoned "MAX_INT_TYPE_SIZE"
.../iq2000/iq2000.h:739:9: attempt to use poisoned "CONST_COSTS"
.../iq2000/iq2000.h:776:9: attempt to use poisoned "RTX_COSTS"
.../iq2000/iq2000.h:880:9: attempt to use poisoned "ADDRESS_COST"
.../iq2000/iq2000.h:918:8: attempt to use poisoned "ASM_OUTPUT_INTERNAL_LABEL"
.../iq2000/iq2000.h:919:9: attempt to use poisoned "ASM_OUTPUT_INTERNAL_LABEL"
.../iq2000/iq2000.h:1347:9: attempt to use poisoned "IMPLICIT_FIX_EXPR"
.../iq2000/iq2000.h:1350:9: attempt to use poisoned "EASY_DIV_EXPR"
.../iq2000/iq2000.h:1353:9: attempt to use poisoned "SLOW_ZERO_EXTEND"
.../iq2000/iq2000.h:1386:9: attempt to use poisoned "SCCS_DIRECTIVE"

It's strange that {CONST|RTX|ADDRESS}_COSTS are still there.  I still
remember Richard Henderson converted all of those to target macros.
Maybe the port was contributed after his sweep!?

Kazu Hirata