[X86] Increase X86_MAX_OPERANDS from 5 to 6

This controls the number of operands in the disassembler's x86OperandSets
table.  The entries describe how the operand is encoded and its type.

Not to surprisingly 5 operands is insufficient for AVX512.  Consider
VALIGNDrrik in the next patch.  These are its operand specifiers:

  { /* 328 */
    { ENCODING_DUP, TYPE_DUP1 },
    { ENCODING_REG, TYPE_XMM512 },
    { ENCODING_WRITEMASK, TYPE_VK8 },
    { ENCODING_VVVV, TYPE_XMM512 },
    { ENCODING_RM_CD64, TYPE_XMM512 },
    { ENCODING_IB, TYPE_IMM8 },
  },

llvm-svn: 214889
diff --git a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h
index 13a7b55..3a6dbcd 100644
--- a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h
+++ b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h
@@ -500,7 +500,7 @@
 };
 #undef ENUM_ENTRY
 
-static const unsigned X86_MAX_OPERANDS = 5;
+static const unsigned X86_MAX_OPERANDS = 6;
 
 /// Decoding mode for the Intel disassembler.  16-bit, 32-bit, and 64-bit mode
 /// are supported, and represent real mode, IA-32e, and IA-32e in 64-bit mode,