Make supported FF-A version configurable in libsp

Introduce CFG_FFA_VERSION macro for configuring FF-A version in libsp.
The value of CFG_FFA_VERSION follows the version format of FFA_VERSION.
The allowed versions are FF-A v1.0 and v1.1.

Signed-off-by: Imre Kis <imre.kis@arm.com>
Change-Id: I7f2b425f9267758c4dfec513bc7a3bde773c7a97
diff --git a/components/rpc/mm_communicate/endpoint/sp/tests.cmake b/components/rpc/mm_communicate/endpoint/sp/tests.cmake
index c68a0c7..397ae53 100644
--- a/components/rpc/mm_communicate/endpoint/sp/tests.cmake
+++ b/components/rpc/mm_communicate/endpoint/sp/tests.cmake
@@ -22,4 +22,5 @@
 		${UNIT_TEST_PROJECT_PATH}/components/rpc/common/interface
 	COMPILE_DEFINITIONS
 		-DARM64
+		-DCFG_FFA_VERSION=0x00010000
 )