Adds the tuple type from Intel's Vol.2A 2.6.5 "Compressed Displacement (disp8*N) Support in EVEX" to the decode tables.
Extends flags field of instr_info_t to 32-bit. The upper half is reserved for the evex tuple type of AVX-512.
Tests will be added in future patch. While each tuple type has been carefully added to the decode tables, there is no decoder/encoder support yet and no tests.
Issue: #1312