Add support for intel_s1000 SoC which is based on Xtensa arch

Signed-off-by: Rajavardhan Gundi <rajavardhan.gundi@intel.com>
diff --git a/boot/zephyr/boards/intel_s1000_crb.overlay b/boot/zephyr/boards/intel_s1000_crb.overlay
new file mode 100644
index 0000000..61f0d43
--- /dev/null
+++ b/boot/zephyr/boards/intel_s1000_crb.overlay
@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2018 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+/ {
+	sram0: memory@be000000 {
+		device_type = "memory";
+		compatible = "mmio-sram";
+		reg = <0xbe000000 0x30000>;
+	};
+};
+