Add workaround to compile with HIP, new neighbor code still needs to be ported

lib/gpu/geryon/hip_device.h

@@ -8,6 +8,9 @@
 #ifndef HIP_DEVICE
 #define HIP_DEVICE
 
+// workaround after GPU package Feb2021 update
+// todo: make new neighbor code work with HIP
+#define LAL_USE_OLD_NEIGHBOR
 
 #include <hip/hip_runtime.h>
 #include <unordered_map>