doc: code-relocation: Update usage of zephyr_code_relocate

Update usage of zephyr_code_relocate to new API, and add examples of
relocating a library target, as well as using multiple files in list or
CMake generator expressions.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>

doc/kernel/code-relocation.rst

@@ -54,14 +54,13 @@ for  data copy operations from ROM to required memory type.
 * Inside the ``CMakeLists.txt`` file in the project, mention
   all the files that need relocation.
 
-  ``zephyr_code_relocate(src/*.c SRAM2)``
+  ``zephyr_code_relocate(FILES src/*.c LOCATION SRAM2)``
 
   Where the first argument is the file/files and the second
   argument is the memory where it must be placed.
 
   .. note::
 
-     The file argument supports limited regular expressions.
      function zephyr_code_relocate() can be called  as many times as required.
      This step has to be performed before calling find_package(Zephyr ...)
      in the application's CMakeLists.txt.
@@ -77,8 +76,8 @@ This section shows additional configuration options that can be set in
 
   .. code-block:: none
 
-     zephyr_code_relocate(src/file1.c SRAM2)
+     zephyr_code_relocate(FILES src/file1.c LOCATION SRAM2)
-     zephyr_code_relocate(src/file2.c.c SRAM)
+     zephyr_code_relocate(FILES src/file2.c LOCATION SRAM)
 
 * if the memory type is appended with _DATA, _TEXT, _RODATA or _BSS, only the
   selected memory is placed in the required memory region.
@@ -86,12 +85,21 @@ This section shows additional configuration options that can be set in
 
   .. code-block:: none
 
-     zephyr_code_relocate(src/file1.c SRAM2_DATA)
+     zephyr_code_relocate(FILES src/file1.c LOCATION SRAM2_DATA)
-     zephyr_code_relocate(src/file2.c.c SRAM2_TEXT)
+     zephyr_code_relocate(FILES src/file2.c LOCATION SRAM2_TEXT)
 
 * Multiple regions can also be appended together such as: SRAM2_DATA_BSS.
   This will place data and bss inside SRAM2.
 
+* Multiple files can be passed to the FILES argument, or CMake generator
+  expressions can be used to relocate a comma-separated list of files
+
+  .. code-block:: none
+
+     file(GLOB sources "file*.c")
+     zephyr_code_relocate(FILES ${sources} LOCATION SRAM)
+     zephyr_code_relocate(FILES $<TARGET_PROPERTY:my_tgt,SOURCES> LOCATION SRAM)
+
 NOCOPY flag
 ===========
 
@@ -106,8 +114,20 @@ to the ``EXTFLASH`` memory region where it will be executed from (XIP). The
 
   .. code-block:: none
 
-     zephyr_code_relocate(src/xip_external_flash.c EXTFLASH_TEXT NOCOPY)
+     zephyr_code_relocate(FILES src/xip_external_flash.c LOCATION EXTFLASH_TEXT NOCOPY)
-     zephyr_code_relocate(src/xip_external_flash.c SRAM_DATA)
+     zephyr_code_relocate(FILES src/xip_external_flash.c LOCATION SRAM_DATA)
+
+Relocating libraries
+====================
+
+Libraries can be relocated using the LIBRARY argument to
+``zephyr_code_relocation()`` with the library name. For example, the following
+snippet will relocate kernel code to ITCM and serial drivers to SRAM2:
+
+  .. code-block:: none
+
+    zephyr_code_relocate(LIBRARY kernel LOCATION ITCM_TEXT)
+    zephyr_code_relocate(LIBRARY drivers__serial LOCATION SRAM2)
 
 Sample
 ======

doc/releases/release-notes-3.3.rst

@@ -311,6 +311,11 @@ Boards & SoC Support
 Build system and infrastructure
 *******************************
 
+* Code relocation
+
+  * ``zephyr_code_relocate`` API has changed to accept a list of files to
+    relocate and a location to place the files.
+
 Drivers and Sensors
 *******************