CMake: Fix NRF52840_DK build failure

* Remove duplicated ARM toolchain directory
* Link with archived cryptocell 310 libraries instead
  of adding them as source files
* Provide default MBED_BOOT_STACK_SIZE definition
  in scatter file as is done for GCC_ARM linker file

Author: hugueskamba

connectivity/drivers/mbedtls/FEATURE_CRYPTOCELL310/TARGET_MCU_NRF52840/CMakeLists.txt

@@ -9,7 +9,10 @@ function(_mbed_get_libcc_310_ext)
     elseif(${MBED_TOOLCHAIN} STREQUAL "IAR")
         set(LIBCC_310_EXT TOOLCHAIN_IAR/lib_cc310_ext.a)
     endif()
-    target_sources(mbed-os PRIVATE ${LIBCC_310_EXT})
+    target_link_libraries(mbed-os
+        PUBLIC
+            ${CMAKE_CURRENT_SOURCE_DIR}/${LIBCC_310_EXT}
+    )
 endfunction()
 
 function(_mbed_get_libcc_310_trng)
@@ -20,7 +23,10 @@ function(_mbed_get_libcc_310_trng)
     elseif(${MBED_TOOLCHAIN} STREQUAL "IAR")
         set(LIBCC_310_TRNG TOOLCHAIN_IAR/lib_cc310_trng.a)
     endif()
-    target_sources(mbed-os PRIVATE ${LIBCC_310_TRNG})
+    target_link_libraries(mbed-os
+        PUBLIC
+            ${CMAKE_CURRENT_SOURCE_DIR}/${LIBCC_310_TRNG}
+    )
 endfunction()
 
 _mbed_get_libcc_310_ext()

connectivity/drivers/mbedtls/FEATURE_CRYPTOCELL310/binaries/CMakeLists.txt

@@ -9,7 +9,10 @@ function(_mbed_get_libcc_310_core)
     elseif(${MBED_TOOLCHAIN} STREQUAL "IAR")
         set(LIBCC_310_CORE TOOLCHAIN_IAR/lib_cc310_ext.a)
     endif()
-    target_sources(mbed-os PRIVATE ${LIBCC_310_CORE})
+    target_link_libraries(mbed-os
+        PUBLIC
+            ${CMAKE_CURRENT_SOURCE_DIR}/${LIBCC_310_CORE}
+    )
 endfunction()
 
 _mbed_get_libcc_310_core()

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52840/device/CMakeLists.txt

@@ -5,7 +5,7 @@ function(_mbed_get_assembly_nrf52840_dk)
     if(${MBED_TOOLCHAIN} STREQUAL "GCC_ARM")
         set(STARTUP_FILE TOOLCHAIN_GCC_ARM/startup_NRF52840.S)
     elseif(${MBED_TOOLCHAIN} STREQUAL "ARM")
-        set(STARTUP_FILE TOOLCHAIN_ARM/startup_nrf52840.S)
+        set(STARTUP_FILE TOOLCHAIN_ARM_STD/startup_nrf52840.S)
     elseif(${MBED_TOOLCHAIN} STREQUAL "IAR")
         set(STARTUP_FILE TOOLCHAIN_IAR/startup_NRF52840_IAR.S)
     endif()
@@ -16,7 +16,7 @@ function(_mbed_set_linker_file)
     if(${MBED_TOOLCHAIN} STREQUAL "GCC_ARM")
         set(LINKER_FILE ${CMAKE_CURRENT_SOURCE_DIR}/TOOLCHAIN_GCC_ARM/NRF52840.ld)
     elseif(${MBED_TOOLCHAIN} STREQUAL "ARM")
-        set(LINKER_FILE ${CMAKE_CURRENT_SOURCE_DIR}/TOOLCHAIN_ARM/nRF52840.sct)
+        set(LINKER_FILE ${CMAKE_CURRENT_SOURCE_DIR}/TOOLCHAIN_ARM_STD/nRF52840.sct)
     elseif(${MBED_TOOLCHAIN} STREQUAL "IAR")
         set(LINKER_FILE ${CMAKE_CURRENT_SOURCE_DIR}/TOOLCHAIN_IAR/nRF52840.icf)
     endif()