plat/arm/sgi: Add board support for SGI-Clark.Helios platform

SGI-Clark.Helios platform is similar to SGI-Clark.Ares platform.
The difference between these two platforms is the CPU type and
the number of CPUs. Add the base support for SGI-Clark.Helios platform.

Change-Id: I2b04cb3fb953907848b4fab016e3648899ca4256
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>
diff --git a/plat/arm/board/sgiclarkh/fdts/sgiclarkh_tb_fw_config.dts b/plat/arm/board/sgiclarkh/fdts/sgiclarkh_tb_fw_config.dts
new file mode 100644
index 0000000..766dc00
--- /dev/null
+++ b/plat/arm/board/sgiclarkh/fdts/sgiclarkh_tb_fw_config.dts
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2018, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/dts-v1/;
+
+/ {
+	/* Platform Config */
+	compatible = "arm,tb_fw";
+	nt_fw_config_addr = <0x0 0xFEF00000>;
+	nt_fw_config_max_size = <0x0100000>;
+	/*
+	 * The following two entries are placeholders for Mbed TLS
+	 * heap information. The default values don't matter since
+	 * they will be overwritten by BL1.
+	 * In case of having shared Mbed TLS heap between BL1 and BL2,
+	 * BL1 will populate these two properties with the respective
+	 * info about the shared heap. This info will be available for
+	 * BL2 in order to locate and re-use the heap.
+	 */
+	mbedtls_heap_addr = <0x0 0x0>;
+	mbedtls_heap_size = <0x0>;
+};