Backport PR matplotlib#31940: Add loongarch64 image comparison tolerances

Author: QuLogic

lib/matplotlib/tests/test_inset.py

@@ -93,8 +93,10 @@ def test_inset_indicator_zorder():
     assert inset.get_zorder() == 42
 
 
-@image_comparison(['zoom_inset_connector_styles.png'], remove_text=True, style='mpl20',
-                  tol=0.024 if platform.machine() in ['aarch64', 'arm64'] else 0)
+@image_comparison(['zoom_inset_connector_styles.png'],
+                  remove_text=True, style='mpl20',
+                  tol=(0.024 if platform.machine() in ['aarch64', 'arm64',
+                                                       'loongarch64'] else 0))
 def test_zoom_inset_connector_styles():
     fig, axs = plt.subplots(2)
     for ax in axs: