R600/SI: Implement SIInstrInfo::verifyInstruction() for VOP*

The function is used by the machine verifier and checks that VOP*
instructions have legal operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192367 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/R600/SIDefines.h

@@ -14,7 +14,11 @@
 namespace SIInstrFlags {
 enum {
   MIMG = 1 << 3,
-  SMRD = 1 << 4
+  SMRD = 1 << 4,
+  VOP1 = 1 << 5,
+  VOP2 = 1 << 6,
+  VOP3 = 1 << 7,
+  VOPC = 1 << 8
 };
 }