* m88k-dis.c: Include libiberty.h (for xmalloc).
(HASHTAB): New type, used to build instruction hash tables.
Contains a pointer to an INSTAB and a pointer to the next hash
chain entry.
(instructions): Move definition from m88k.h; remove initialization
of 'next' field.
(hashtable): Now an aray of pointer-to-HASHTAB, not INSTAB.
(printop): Mark pointer to OPSPEC as const.
(install): Remove; fold into init_disasm.
(m88kdis): Update to ihashtab_initialized to 1 after calling
init_disasm. entry_ptr now iterates through HASHTABs, not
INSTABs.
(init_disasm): Iterate through the instructions and add to
hashtable[].
