docs: add TF-A version numbering information
Add a chapter "Version numbering" in release information file that
explains macros used for TF-A version. It also introduces VERSION_PATCH
macro that is used for LTS releases. A comment for this macro is also
added in Makefile.
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I946b6cb91bb8454131f07b24534d28ab1aef1771
diff --git a/Makefile b/Makefile
index 640060b..f55dfdd 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@
#
VERSION_MAJOR := 2
VERSION_MINOR := 9
-VERSION_PATCH := 0
+VERSION_PATCH := 0 # Only used for LTS releases
VERSION := ${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}
# Default goal is build all images