owners: Add myself to reviewers

I would be happy to help with the code review and speed up the feedback
loop.

Limited to non configuration and non schema related things since
i lack the overview about the specific platforms and devices to say
anything useful there. Also to not get overwhelmed with emails.

Had a very good experience with what Christopher Sides did in terms of
review which helped me to improve my patches, so i want to follow his
example here.

Change-Id: I8dfd428ae8e0728d417dc1a82d5686e3f9174daa
Signed-off-by: Alexander Hansen <alexander.hansen@9elements.com>
diff --git a/OWNERS b/OWNERS
index f896f6b..b84ab8f 100644
--- a/OWNERS
+++ b/OWNERS
@@ -44,6 +44,12 @@
 - partial_regex: configurations/meta
   owners:
     - patrick@stwcx.xyz
+- partial_regex: src
+  reviewers:
+    - alexander.hansen@9elements.com
+- partial_regex: test
+  reviewers:
+    - alexander.hansen@9elements.com
 
 openbmc:
 - name: Ed Tanous
@@ -64,3 +70,6 @@
 - name: Patrick Williams
   email: patrick@stwcx.xyz
   discord: stwcx
+- name: Alexander Hansen
+  email: alexander.hansen@9elements.com
+  discord: Alexander