(DSYMMODE): Remove.
(parse_exp): Replace expressionS argument with a h8_op. Parse the
operand size as well.
(skip_colonthing): Remove unused expression argument. Tighten checks
for 2-digit sizes.
(colonmod24): Remove.
(get_mova_operands): Combine calls to parse_exp and skip_colonthing.
(get_operand): Likewise. Use the standard code to read the size of
pc-relative operands.
(fix_operand_size): Include the size-guessing logic that used to be
in colonmod24 and get_operand. Don't apply dd:2 optimizations to
offsets with a symbolic component.
testsuite/
* gas/h8300/h8sx_disp2.[sd]: Add tests for symbolic displacements.