Disable dpp for wavefront 32 (#857)

Co-authored-by: mvermeulen <5479696+mvermeulen@users.noreply.github.com>

src/targets/gpu/device/include/migraphx/gpu/device/reduce.hpp

@@ -11,6 +11,10 @@ inline namespace MIGRAPHX_INLINE_NS {
 namespace gpu {
 namespace device {
 
+#if __AMDGCN_WAVEFRONT_SIZE == 32
+#define MIGRAPHX_NO_DPP
+#endif
+
 struct sum
 {
     template <class T, class U>