Consolidate targets settings in opteesp deployments

In the "opteesp" environment UUID and SP name is communicated from cmake
to C sources using macro definitions. Refactor the cmake scripts to
remove duplication.

Change-Id: Ia51a334035a9120293b28ef8a46e66578c5d6c90
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
diff --git a/tools/cmake/common/TargetCompileDefinitions.cmake b/tools/cmake/common/TargetCompileDefinitions.cmake
index 15d55ad..f401a40 100644
--- a/tools/cmake/common/TargetCompileDefinitions.cmake
+++ b/tools/cmake/common/TargetCompileDefinitions.cmake
@@ -74,6 +74,11 @@
 ``SP_NAME``
 The name of the SP.
 
+OUTPUTS:
+
+``SP_UUID_LE``
+SP_UUID converted to little-endian binary format.
+
 #]===]
 
 function (set_target_uuids)