secure platforms: use spmc boot flow

Change-Id: I1fe972cc7f6b0d6fdb098b7e9b15e631f384b3d4
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/BUILD.gn b/BUILD.gn
index 5a00bc4..5596009 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -58,7 +58,7 @@
 aarch64_toolchains("secure_aem_v8a_fvp") {
   cpu = "cortex-a57"
   origin_address = "0x06000000"
-  boot_flow = "//src/boot_flow:linux"
+  boot_flow = "//src/boot_flow:spmc"
   console = "//src/arch/aarch64/pl011"
   iommu = "//src/iommu:absent"
   gic_version = 3
@@ -153,7 +153,7 @@
 aarch64_toolchains("secure_tc0") {
   cpu = "cortex-a57"
   origin_address = "0xfd000000"
-  boot_flow = "//src/boot_flow:linux"
+  boot_flow = "//src/boot_flow:spmc"
   console = "//src/arch/aarch64/pl011"
   iommu = "//src/iommu:absent"
   gic_version = 3