Fix virt role detection for kvm if no other match (#35403)

This fixes an indention bug introduced in
45a9f96774
that was causing the virtualization_role to be set to 'host'
for many cases incorrectly.

Fixes https://github.com/ansible/ansible/pull/21621
(the issue mentioned in the pr)

lib/ansible/module_utils/facts/virtual/linux.py

@@ -209,7 +209,8 @@ class LinuxVirtual(Virtual):
 
                 else:
                     virtual_facts['virtualization_type'] = 'kvm'
-                virtual_facts['virtualization_role'] = 'host'
+                    virtual_facts['virtualization_role'] = 'host'
+
                 return virtual_facts
 
             if 'vboxdrv' in modules: