CSKY: Refine operand format error reporting.

CSKY: Refine operand format error reporting.

Rename SET_ERROR_NUMBER to SET_ERROR_STRING, and add SET_ERROR_INTEGER
to report error message which pass an integer argument.

gas/
	* config/tc-csky.c (csky_error_state): New member 'arg_int'.
	(SET_ERROR_NUMBER): Rename to SET_ERROR_STRING.
	(SET_ERROR_INTEGER): New.
	(err_formats): Add error format for ERROR_FREG_OVER_RANGE and
	ERROR_VREG_OVER_RANGE.
	(csky_show_error): Pass an integer argument for some error
	numbers.
	(parse_exp): Call SET_ERROR_STRING instead of SET_ERROR_NUMBER.
	(parse_rt): Likewise.
	(parse_type_ctrlreg): Likewise.
	(csky_get_reg_val): Likewise.
	(is_reglist_legal): Likewise.
	(is_freglist_legal): Likewise.
	(is_reglist_dash_comma_legal): Likewise.
	(is_reg_lshift_illegal): Likewise.
	(is_psr_bit): Likewise.
	(parse_type_cpreg): Likewise.
	(parse_type_cpcreg): Likewise.
	(parse_type_areg): Likewise.
	(parse_type_freg): Likewise.
	(parse_ldst_imm): Likewise and call SET_ERROR_INTEGER.
	(get_operand_value): Likewise.
	(parse_operands_op): Likewise and call is_imm_within_range,
	is_imm_within_range_ext and is_oimm_within_range.
	(md_assemble): Likewise.
	(is_imm_within_range): New.
	(is_imm_within_range_ext): Rename from is_imm_over_range.
	(is_oimm_within_range): Rename from is_oimm_over_range.
	(v2_work_add_sub): Call SET_ERROR_INTEGER.
	(csky_rolc): call is_imm_within_range instead of
	is_imm_over_range.

opcodes/
	* csky-dis.c (csky_output_operand): Assign dis_info.value for
	OPRND_TYPE_VREG.