docs(rme): add build and run instructions for FEAT_RME

This patch adds instructions on how to build and run TF-A
with FEAT_RME enabled. The patch also adds code owners for
FEAT_RME.

Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com>
Change-Id: Id16dc52cb76b1ea56ac5c3fc38cb0794a62ac2a1
diff --git a/docs/about/maintainers.rst b/docs/about/maintainers.rst
index 1bd4666..7db81fc 100644
--- a/docs/about/maintainers.rst
+++ b/docs/about/maintainers.rst
@@ -109,6 +109,16 @@
 :|G|: `john-powell-arm`_
 :|F|: bl31/ehf.c
 
+Realm Management Extension (RME)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+:|M|: Bipin Ravi <bipin.ravi@arm.com>
+:|G|: `bipinravi-arm`_
+:|M|: Mark Dykes <mark.dykes@arm.com>
+:|G|: `mardyk01`_
+:|M|: John Powell <John.Powell@arm.com>
+:|G|: `john-powell-arm`_
+:|M|: Zelalem Aweke <Zelalem.Aweke@arm.com>
+:|G|: `zelalem-aweke`_
 
 Drivers, Libraries and Framework Code
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~