Add support to ppc64le. Disable pypy as this is not supported

.travis.yml

@@ -2,6 +2,10 @@ sudo: false
 
 language: python
 
+arch:
+  - amd64
+  - ppc64le
+
 python:
   - pypy
   - 2.7
@@ -25,6 +29,15 @@ matrix:
     - python: 3.9
       env:
       - TOXENV=flake8
-
+    # Power job  
+    - python: 3.9
+      arch: ppc64le
+      env:
+      - TOXENV=flake8
+  
+  exclude:
+    - python: pypy
+      arch: ppc64le
+      
 after_success:
   - coverage combine && codecov