Support for CUDA 11.4

mpcdf_common.py

@@ -264,6 +264,8 @@ def valid_cuda(cuda, compiler):
         return compiler == "gcc_9"
     if cuda == "cuda_11_2":
         return compiler == "gcc_10"
+    if cuda == "cuda_11_4":
+        return compiler == "gcc_11"
     return False