Update toolchain files

Add aarch64-none-linux-gnu toolchain file

Change-Id: I04742a8e0478f31087ea9c0d5a7d62c7e07bf4f4
diff --git a/cmake/toolchain/aarch64-linux-gnu.cmake b/cmake/toolchain/aarch64-linux-gnu.cmake
index 31fd953..8d95e57 100644
--- a/cmake/toolchain/aarch64-linux-gnu.cmake
+++ b/cmake/toolchain/aarch64-linux-gnu.cmake
@@ -1,5 +1,5 @@
 #
-# SPDX-FileCopyrightText: Copyright 2020-2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
+# SPDX-FileCopyrightText: Copyright 2020-2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
 #
 # SPDX-License-Identifier: Apache-2.0
 #
@@ -16,9 +16,11 @@
 # limitations under the License.
 #
 
-set(CMAKE_SYSTEM_NAME Generic)
+set(CMAKE_SYSTEM_NAME Linux)
 set(CMAKE_C_COMPILER "aarch64-linux-gnu-gcc")
 set(CMAKE_CXX_COMPILER "aarch64-linux-gnu-g++")
+set(CMAKE_LINKER "aarch64-linux-gnu-ld")
+
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_SYSTEM_PROCESSOR "aarch64")
 
diff --git a/cmake/toolchain/aarch64-none-linux-gnu.cmake b/cmake/toolchain/aarch64-none-linux-gnu.cmake
new file mode 100644
index 0000000..6b216cd
--- /dev/null
+++ b/cmake/toolchain/aarch64-none-linux-gnu.cmake
@@ -0,0 +1,27 @@
+#
+# SPDX-FileCopyrightText: Copyright 2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the License); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an AS IS BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_C_COMPILER "aarch64-none-linux-gnu-gcc")
+set(CMAKE_CXX_COMPILER "aarch64-none-linux-gnu-g++")
+set(CMAKE_LINKER "aarch64-none-linux-gnu-ld")
+
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_SYSTEM_PROCESSOR "aarch64")
+
+add_compile_options(-Wall -Wextra)