build(arm_fpga): add arm_fpga build

Adding PLAT=arm_fpga build to plat builds.

Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
Change-Id: Ia1573bf042a552637da21132f99a7f6221dc0572
diff --git a/group/tf-l1-build-plat/arm-fpga-default:nil b/group/tf-l1-build-plat/arm-fpga-default:nil
new file mode 100644
index 0000000..5515958
--- /dev/null
+++ b/group/tf-l1-build-plat/arm-fpga-default:nil
@@ -0,0 +1,6 @@
+#
+# Copyright (c) 2023 Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
diff --git a/tf_config/arm-fpga-default b/tf_config/arm-fpga-default
new file mode 100644
index 0000000..1264655
--- /dev/null
+++ b/tf_config/arm-fpga-default
@@ -0,0 +1,2 @@
+CROSS_COMPILE=aarch64-none-elf-
+PLAT=arm_fpga