SPMD: add command line parameter to run SPM at S-EL2 or S-EL1

Added SPMD_SPM_AT_SEL2 build command line parameter.
Set to 1 to run SPM at S-EL2.
Set to 0 to run SPM at S-EL1 (pre-v8.4 or S-EL2 is disabled).
Removed runtime EL from SPM core manifest.

Change-Id: Icb4f5ea4c800f266880db1d410d63fe27a1171c0
Signed-off-by: Artsem Artsemenka <artsem.artsemenka@arm.com>
Signed-off-by: Max Shvetsov <maksims.svecovs@arm.com>
diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index 8e1f273..9273469 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -188,6 +188,9 @@
 # Enable the Management Mode (MM)-based Secure Partition Manager implementation
 SPM_MM				:= 0
 
+# Use SPM at S-EL2 as a default config for SPMD
+SPMD_SPM_AT_SEL2		:= 1
+
 # Flag to introduce an infinite loop in BL1 just before it exits into the next
 # image. This is meant to help debugging the post-BL2 phase.
 SPIN_ON_BL1_EXIT		:= 0