* config/tc-crx.c: Remove global variable 'post_inc_mode'.

* config/tc-crx.c: Remove global variable 'post_inc_mode'.
(get_flags): New function.
(get_number_of_bits): Edit comments, update numeric values to supported sizes.
(process_label_constant): Don't support the colon format (SYMBOL:[s|m|l]).
(set_cons_rparams): Support argument type 'arg_rbase'.
(get_operandtype): Bug fix in 'rbase' operand type parsing.
(handle_LoadStor): Bug fix, first handle post-increment mode.
(getreg_image): Remove redundant code, update according to latest CRX spec.
(print_constant): Bug fix relate to 3-word instructions.
(assemble_insn): Bug fix, when matching instructions, verify also instruction type (not only mnemonic).
Add various error checking.
(preprocess_reglist): Support HI/LO and user registers.