CSKY: Add objdump option -M abi-names.

Add option parser for disassembler, and refine the codes of
parse register operand and disassemble register operand.
While strengthen the operands legality check of some instructions.

Co-Authored-By: Lifang Xia <lifang_xia@c-sky.com>

gas/
	* config/tc-csky.c (parse_type_ctrlreg): Use function
	csky_get_control_regno to operand.
	(csky_get_reg_val): Likewise.
	(is_reg_sp_with_bracket): Use function csky_get_reg_val
	to parse operand.
	(is_reg_sp): Refine.
	(is_oimm_within_range): Fix, report error when operand
	is not constant.
	(parse_type_cpreg): Refine.
	(parse_type_cpcreg): Refine.
	(get_operand_value): Add handle of OPRND_TYPE_IMM5b_LS.
	(md_assemble): Fix no error reporting somtimes when
	operands number are not fit.
	(csky_addc64): Refine.
	(csky_subc64): Refine.
	(csky_or64): Refine.
	(v1_work_fpu_fo): Refine.
	(v1_work_fpu_read): Refine.
	(v1_work_fpu_writed): Refine.
	(v1_work_fpu_readd): Refine.
	(v2_work_addc): New function, strengthen the operands legality
	check of addc.
	* gas/testsuite/gas/csky/all.d : Use register number format when
	disassemble register name by default.
	* gas/testsuite/gas/csky/cskyv2_all.d : Likewise.
	* gas/testsuite/gas/csky/trust.d: Likewise.
	* gas/testsuite/gas/csky/cskyv2_ck860.d : Fix.
	* gas/testsuite/gas/csky/trust.s : Fix.

opcodes/
	* csky-dis.c (using_abi): New.
	(parse_csky_dis_options): New function.
	(get_gr_name): New function.
	(get_cr_name): New function.
	(csky_output_operand): Use get_gr_name and get_cr_name to
	disassemble and add handle of OPRND_TYPE_IMM5b_LS.
	(print_insn_csky): Parse disassembler options.
	* opcodes/csky-opc.h (OPRND_TYPE_IMM5b_LS): New enum.
	(GENARAL_REG_BANK): Define.
	(REG_SUPPORT_ALL): Define.
	(REG_SUPPORT_ALL): New.
	(ASH): Define.
	(REG_SUPPORT_A): Define.
	(REG_SUPPORT_B): Define.
	(REG_SUPPORT_C): Define.
	(REG_SUPPORT_D): Define.
	(REG_SUPPORT_E): Define.
	(csky_abiv1_general_regs): New.
	(csky_abiv1_control_regs): New.
	(csky_abiv2_general_regs): New.
	(csky_abiv2_control_regs): New.
	(get_register_name): New function.
	(get_register_number): New function.
	(csky_get_general_reg_name): New function.
	(csky_get_general_regno): New function.
	(csky_get_control_reg_name): New function.
	(csky_get_control_regno): New function.
	(csky_v2_opcodes): Prefer two oprerans format for bclri and
	bseti, strengthen the operands legality check of addc, zext
	and sext.

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