[vdi] Refactor texture/surface reference support.

Change-Id: I8014d82aae7139ef5f95e4b50c4fc6da200dbc9d

tests/src/texture/simpleTexture2DLayered.cpp

@@ -30,9 +30,6 @@ THE SOFTWARE.
 typedef float T;
 
 // Texture reference for 2D Layered texture
-#if __HIP__
-__hip_pinned_shadow__
-#endif
 texture<float, hipTextureType2DLayered> tex2DL;
 
 __global__ void simpleKernelLayeredArray(T* outputData,int width,int height,int layer)