R600/SI: Fix return type for isMIMG / isSMRD

All the others use bool, so these should too.

llvm-svn: 214106
diff --git a/llvm/lib/Target/R600/SIInstrInfo.h b/llvm/lib/Target/R600/SIInstrInfo.h
index 13ab484..914138b 100644
--- a/llvm/lib/Target/R600/SIInstrInfo.h
+++ b/llvm/lib/Target/R600/SIInstrInfo.h
@@ -96,8 +96,8 @@
 
   bool isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const override;
   bool isDS(uint16_t Opcode) const;
-  int isMIMG(uint16_t Opcode) const;
-  int isSMRD(uint16_t Opcode) const;
+  bool isMIMG(uint16_t Opcode) const;
+  bool isSMRD(uint16_t Opcode) const;
   bool isVOP1(uint16_t Opcode) const;
   bool isVOP2(uint16_t Opcode) const;
   bool isVOP3(uint16_t Opcode) const;