[AMDGPU][MC][DOC] A fix for build failure in r349370

llvm-svn: 349375
diff --git a/llvm/docs/AMDGPU/gfx9_attr.rst b/llvm/docs/AMDGPU/gfx9_attr.rst
index c69589f..faffcc7 100644
--- a/llvm/docs/AMDGPU/gfx9_attr.rst
+++ b/llvm/docs/AMDGPU/gfx9_attr.rst
@@ -23,7 +23,7 @@
 
 Examples:
 
-.. code-block:: nasm
+.. parsed-literal::
 
     v_interp_p1_f32 v1, v0, attr0.x
     v_interp_p1_f32 v1, v0, attr32.w