plat: move poplar build to release

Move poplar platform build to release builds from debug builds
as debug builds are causing ROM size overflow and build failure.

Change-Id: Ic0765f9d410449ed8aa33071f8f30655f0c86808
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/group/tf-l1-build-plat/poplar-default:nil b/group/tf-l1-build-plat/poplar-release:nil
similarity index 100%
rename from group/tf-l1-build-plat/poplar-default:nil
rename to group/tf-l1-build-plat/poplar-release:nil
diff --git a/tf_config/poplar-default b/tf_config/poplar-release
similarity index 84%
rename from tf_config/poplar-default
rename to tf_config/poplar-release
index c274134..fc7d620 100644
--- a/tf_config/poplar-default
+++ b/tf_config/poplar-release
@@ -1,2 +1,3 @@
 CROSS_COMPILE=aarch64-none-elf-
 PLAT=poplar
+DEBUG=0