AMDGPU: Add sram-ecc feature

Differential Revision: https://reviews.llvm.org/D53222

llvm-svn: 346177
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.cpp b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
index 9a7e691..f1acd72 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
@@ -198,7 +198,7 @@
     HasDPP(false),
     HasR128A16(false),
     HasDLInsts(false),
-    D16PreservesUnusedBits(false),
+    EnableSRAMECC(false),
     FlatAddressSpace(false),
     FlatInstOffsets(false),
     FlatGlobalInsts(false),