Reveal base pointer spec

This MR reveals the base pointer specification to the user in the config

pystencils/cpu/kernelcreation.py

@@ -73,7 +73,11 @@ def create_kernel(assignments: NodeCollection,
         typed_split_groups = [[type_symbol(s) for s in split_group] for split_group in split_groups]
         split_inner_loop(ast_node, typed_split_groups)
 
-    base_pointer_spec = [['spatialInner0'], ['spatialInner1']] if len(loop_order) >= 2 else [['spatialInner0']]
+    base_pointer_spec = config.base_pointer_specification
+    if base_pointer_spec is None:
+        base_pointer_spec = []
+        if config.cpu_vectorize_info and config.cpu_vectorize_info.get('nontemporal'):
+            base_pointer_spec = [['spatialInner0'], ['spatialInner1']] if len(loop_order) >= 2 else [['spatialInner0']]
     base_pointer_info = {field.name: parse_base_pointer_info(base_pointer_spec, loop_order,
                                                              field.spatial_dimensions, field.index_dimensions)
                          for field in fields_without_buffers}