Revert r152202: "Use uint16_t to store InstrNameIndices in MCInstrInfo."

We cannot limit the concatenated instruction names to 64K.  ARM is
already at 32K, and it is easy to imagine a target with more
instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152817 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/StringToOffsetTable.h

@@ -40,9 +40,6 @@ public:
   }
   
   void EmitString(raw_ostream &O) {
-    assert(AggregateString.size() <= 65536 &&
-           "Aggregate string too large to be portable");
-
     // Escape the string.
     SmallString<256> Str;
     raw_svector_ostream(Str).write_escaped(AggregateString);