MAINTAINERS: Add Iwona Winiarska as a reviewer

Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
Change-Id: If7ffc881ab263726da5eb9bdd4949e319aaf7ad0
diff --git a/MAINTAINERS b/MAINTAINERS
index f70724a..e614e01 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -44,3 +44,4 @@
 
 M:  Jeremy Kerr <jk@ozlabs.org> <jk-!>
 M:  Andrew Jeffery <andrew@aj.id.au> <amboar!>
+R:  Iwona Winiarska <iwona.winiarska@intel.com> <iklm!>