Update Arm TF-A to v2.0

Change-Id: I3a55717d3dbcb415db655e266fe5a94c0eeea026
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
diff --git a/hikey.xml b/hikey.xml
index d284eb1..50d42b3 100644
--- a/hikey.xml
+++ b/hikey.xml
@@ -19,7 +19,7 @@
         <project path="patches_hikey"        name="linaro-swg/patches_hikey.git"          revision="d9c07f0ac0ce5fe57d367be82b8673aae8e81e96" />
 
         <!-- Misc gits -->
-        <project path="arm-trusted-firmware" name="ARM-software/arm-trusted-firmware.git" revision="02f8c03884d69c5915f07b82851f72fbacb448bd" />
+        <project path="arm-trusted-firmware" name="ARM-software/arm-trusted-firmware.git" revision="refs/tags/v2.0" clone-depth="1" />
         <project path="atf-fastboot"         name="96boards-hikey/atf-fastboot.git"       revision="af5ddb16266e54745d3b2e354d32b54fefbbbd78" />
         <project path="burn-boot"            name="96boards-hikey/burn-boot.git"          revision="bee2ea1660f3a03df8d391fb75aa08dbc3441856" />
         <project path="busybox"              name="mirror/busybox.git"                    revision="refs/tags/1_24_0" clone-depth="1" />