docs(changelog): changelog for v2.10 release

Change-Id: I44b88c3232d099b85ff71ee14c4918c4f8180146
Signed-off-by: Juan Pablo Conde <juanpablo.conde@arm.com>
diff --git a/Makefile b/Makefile
index 5edd385..97c3c15 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@
 # Trusted Firmware Version
 #
 VERSION_MAJOR			:= 2
-VERSION_MINOR			:= 9
+VERSION_MINOR			:= 10
 VERSION_PATCH			:= 0	# Only used for LTS releases
 VERSION				:= ${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}