spmc: hypervisor calls moved to a separate module

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I285ffc684aa780246468355add9d03c1b5b8fefb
diff --git a/include/runtime_services/spm_common.h b/include/runtime_services/spm_common.h
index dbb113b..2d6e51a 100644
--- a/include/runtime_services/spm_common.h
+++ b/include/runtime_services/spm_common.h
@@ -14,6 +14,9 @@
 /* Hypervisor ID at physical FFA instance */
 #define HYP_ID          (0)
 
+/* ID for the first Secure Partition. */
+#define SPM_VM_ID_FIRST                 SP_ID(1)
+
 /*
  * The bit 15 of the FF-A ID indicates whether the partition is executing
  * in the normal world, in case it is a Virtual Machine (VM); or in the