(enum reg): Rearrange registers, remove 'ccfg' and 'pc'.

(enum reg): Rearrange registers, remove 'ccfg' and 'pc'.
(enum reg_type): Remove CRX_PC_REGTYPE, CRX_MTPR_REGTYPE.
(enum operand_type): Rearrange operands, edit comments.
replace us<N> with ui<N> for unsigned immediate.
replace d<N> with disps<N>/dispu<N>/dispe<N> for signed/unsigned/escaped displacements (respectively).
replace rbase_ridx_scl2_dispu<N> with rindex_disps<N> for register index.
(instruction type): Add NO_TYPE_INS.
(instruction flags): Add USER_REG, CST4MAP, NO_SP, NO_RPTR.
(operand_entry): New field - 'flags'.
(operand flags): New.