SPM: Remove remaining SMC interfaces

Also, add a disclaimer to explain that the current implementation of SPM
is a prototype that is going to undergo a lot of rework.

Change-Id: I303c1e61c51d9f286cc599fea565fc9ba5a996bf
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/services/std_svc/std_svc_setup.c b/services/std_svc/std_svc_setup.c
index 1a81a0a..86ecdf7 100644
--- a/services/std_svc/std_svc_setup.c
+++ b/services/std_svc/std_svc_setup.c
@@ -102,7 +102,7 @@
 		SMC_RET1(handle, ret);
 	}
 
-#if ENABLE_SPM
+#if ENABLE_SPM && SPM_DEPRECATED
 	/*
 	 * Dispatch SPM calls to SPM SMC handler and return its return
 	 * value