CMake: Add mbed-psa-tal (Test Abstraction Layers)

Move /val and /pal directories into /test_abstraction_layers directory
and combine into one CMake target, mbed-psa-tal. Moved into seperate
directory in order to have own CMakeLists.txt, rather than adding to
/TARGET_MBED_PSA_SRV CMake file.

platform/FEATURE_EXPERIMENTAL_API/FEATURE_PSA/TARGET_MBED_PSA_SRV/CMakeLists.txt

@@ -6,7 +6,6 @@ target_include_directories(mbed-psa
         inc
         inc/psa
         mbedtls
-        pal
         services/platform
         services/attestation
         services/attestation/qcbor
@@ -28,13 +27,6 @@ target_sources(mbed-psa
         mbedtls/psa_crypto_storage.c
         mbedtls/psa_its_file.c
 
-        pal/pal_attestation_eat.c
-        pal/pal_attestation_intf.c
-        pal/pal_client_api_empty_intf.c
-        pal/pal_client_api_intf.c
-        pal/pal_internal_trusted_storage_intf.c
-        pal/pal_protected_storage_intf.c
-
         services/attestation/attest_boot_status_loader.c
         services/attestation/attest_crypto.c
         services/attestation/attest_crypto_keys.c
@@ -78,3 +70,6 @@ target_link_libraries(mbed-psa
         mbed-storage-kv-global-api
         mbed-device_key
 )
+
+add_subdirectory(test_abstraction_layers)
+

platform/FEATURE_EXPERIMENTAL_API/FEATURE_PSA/TARGET_MBED_PSA_SRV/test_abstraction_layers/CMakeLists.txt

@@ -0,0 +1,32 @@
+# Copyright (c) 2021 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+add_library(mbed-psa-tal INTERFACE)
+
+target_include_directories(mbed-psa-tal
+    INTERFACE
+        pal
+        val
+)
+
+target_sources(mbed-psa-tal
+    INTERFACE
+        pal/pal_attestation_eat.c
+        pal/pal_attestation_intf.c
+        pal/pal_client_api_empty_intf.c
+        pal/pal_client_api_intf.c
+        pal/pal_internal_trusted_storage_intf.c
+        pal/pal_protected_storage_intf.c
+        pal/pal_mbed_os_intf.cpp
+
+        val/val_attestation.c
+        val/val_interfaces.c
+        val/val_internal_trusted_storage.c
+        val/val_protected_storage.c
+        val/val_greentea.cpp
+)
+
+target_link_libraries(mbed-psa-tal
+    INTERFACE
+        mbed-psa
+)