AMDGPU: Remove -mcpu=SI

Leftover from before amdgcn/r600 split.

llvm-svn: 310277
diff --git a/llvm/test/CodeGen/AMDGPU/llvm.log2.ll b/llvm/test/CodeGen/AMDGPU/llvm.log2.ll
index b9d593e..15138cff 100644
--- a/llvm/test/CodeGen/AMDGPU/llvm.log2.ll
+++ b/llvm/test/CodeGen/AMDGPU/llvm.log2.ll
@@ -1,6 +1,6 @@
 ;RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s --check-prefix=EG --check-prefix=FUNC
 ;RUN: llc < %s -march=r600 -mcpu=cayman | FileCheck %s --check-prefix=CM --check-prefix=FUNC
-;RUN: llc < %s -march=amdgcn -mcpu=SI | FileCheck %s --check-prefix=SI --check-prefix=FUNC
+;RUN: llc < %s -march=amdgcn -mcpu=tahiti | FileCheck %s --check-prefix=SI --check-prefix=FUNC
 ;RUN: llc < %s -march=amdgcn -mcpu=tonga | FileCheck %s --check-prefix=SI --check-prefix=FUNC
 
 ;FUNC-LABEL: {{^}}test: