Fix macro

Signed-off-by: Dmitry Sidorov <dmitry.sidorov@intel.com>

Original commit:
KhronosGroup/SPIRV-LLVM-Translator@c31e033

Author: MrSidims

llvm-spirv/lib/SPIRV/libSPIRV/SPIRVInstruction.h

@@ -2916,7 +2916,7 @@ class SPIRVExpectKHRInstBase : public SPIRVInstTemplateBase {
   typedef SPIRVInstTemplate<SPIRVExpectKHRInstBase, Op##x, __VA_ARGS__>        \
       SPIRV##x;
 _SPIRV_OP(ExpectKHR, true, 5)
-#undef _SPIRV_OP_INTERNAL
+#undef _SPIRV_OP
 
 class SPIRVSubgroupShuffleINTELInstBase : public SPIRVInstTemplateBase {
 protected: