feat(nxp/layerscape): add build config and variants for ls1046a

Add build config and variants for ls1046a platforms.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Change-Id: Ib14a256bc4aa43309a1e62d5760381aa44cf34da
diff --git a/group/tf-l1-build-plat/ls1046aqds-default:nil b/group/tf-l1-build-plat/ls1046aqds-default:nil
new file mode 100644
index 0000000..35f8713
--- /dev/null
+++ b/group/tf-l1-build-plat/ls1046aqds-default:nil
@@ -0,0 +1,5 @@
+#
+# Copyright (c) 2022 Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#