cmake: linker: arm: adding Zephyr CMake linker files for arm arch

This is the initial version of a Zephyr CMake linker file for the arm
architecture.

This file defines memory regions, groups, linker sections and symbols
for the arm architecture.

It also sources the common common-ram.cmake, common-rom.cmake,
debug-sections,cmake, and thread-local-storage.cmake.

It configure sections for SoC families using zephyr_linker_sources()
functions:
- nxp_imx

Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>

CMakeLists.txt

@@ -77,6 +77,8 @@ zephyr_include_directories(
   ${STDINCLUDE}
 )
 
+include(${ZEPHYR_BASE}/cmake/linker_script/${ARCH}/linker.cmake OPTIONAL)
+
 # Don't add non-existing include directories, it creates noise and
 # warnings in some tooling
 foreach(optional_include_dir