BL1: Add BL1

As a (split) first-stage bootloader designed to be implemented in a
combination of ROM and OTP.

Change-Id: I3e4a31ff04d81198a8964b7bd78799cfd177e0a1
Signed-off-by: Raef Coles <raef.coles@arm.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index fb232c0..71a5f81 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -89,6 +89,11 @@
     add_subdirectory(bl2)
 endif()
 
+if(BL1 AND PLATFORM_DEFAULT_BL1)
+    add_subdirectory(bl1/bl1_2)
+    add_subdirectory(bl1/bl1_1)
+endif()
+
 add_subdirectory(platform)
 
 include(cmake/install.cmake)