ubsan: opcodes/csky-opc.h:929 shift exponent 536870912

ubsan: opcodes/csky-opc.h:929 shift exponent 536870912

opcodes/
	* csky-opc.h: Formatting.
	(GENERAL_REG_BANK): Correct spelling.  Update use throughout file.
	(get_register_name): Mask arch with CSKY_ARCH_MASK for shift,
	and shift 1u.
	(get_register_number): Likewise.
	* csky-dis.c (get_gr_name, get_cr_name): Don't mask mach_flag.
gas/
	* config/tc-csky.c (parse_type_ctrlreg): Don't mask mach_flag
	for csky_get_control_regno.
	(csky_get_reg_val): Likewise when calling csky_get_general_regno.