soc: nxp: imxrt: Prepare imxrt6xx soc for AMP support

imxrt6xx are dual core devices featuring an ARM Cortex-M33
core and an Cadence Xtensa HIFI4 Audio DSP.

Currently only m33 core is supported. In order to support
the Cadence DSP we need first to do some code-reorganization
for m33.

We start by moving all cm33 related code to its own directory
and introduce the cpuclusters property in soc.yml file.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>

samples/sensor/fxos8700/README.rst

@@ -117,7 +117,7 @@ Sample can be built and executed for the MIMXRT685-EVK as follows:
 
 .. zephyr-app-commands::
    :zephyr-app: samples/sensor/fxos8700
-   :board: mimxrt685_evk
+   :board: mimxrt685_evk/mimxrt685s/cm33
    :goals: build flash
    :compact:
 

samples/sensor/fxos8700/sample.yaml

@@ -16,7 +16,7 @@ tests:
       - rv32m1_vega/openisa_rv32m1/ri5cy
       - twr_ke18f
       - lpcxpresso55s16
-      - mimxrt685_evk
+      - mimxrt685_evk/mimxrt685s/cm33
       - frdm_k22f
       - mimxrt1024_evk
       - mimxrt595_evk/mimxrt595s/cm33
@@ -34,7 +34,7 @@ tests:
       - bbc_microbit
       - lpcxpresso55s69/lpc55s69/cpu0
       - reel_board
-      - mimxrt685_evk
+      - mimxrt685_evk/mimxrt685s/cm33
       - mimxrt595_evk/mimxrt595s/cm33
     integration_platforms:
       - bbc_microbit

samples/sensor/lps22hh_i3c/README.rst

@@ -43,7 +43,7 @@ Building on mimxrt685_evk board
 .. zephyr-app-commands::
    :zephyr-app: samples/sensor/lps22hh_i3c
    :host-os: unix
-   :board: mimxrt685_evk
+   :board: mimxrt685_evk/mimxrt685s/cm33
    :goals: build
    :compact:
 

samples/sensor/lsm6dso_i2c_on_i3c/README.rst

@@ -34,7 +34,7 @@ Building on mimxrt685_evk board
 .. zephyr-app-commands::
    :zephyr-app: samples/sensor/lsm6dso_i2c_on_i3c
    :host-os: unix
-   :board: mimxrt685_evk
+   :board: mimxrt685_evk/mimxrt685s/cm33
    :goals: build
    :compact:
 

samples/subsys/fs/littlefs/sample.yaml

@@ -11,7 +11,7 @@ tests:
       - nrf52840dk/nrf52840
       - particle_xenon
       - disco_l475_iot1
-      - mimxrt685_evk
+      - mimxrt685_evk/mimxrt685s/cm33
       - mimxrt1060_evk
       - mimxrt1064_evk
       - qemu_x86