doc: can: move the documention for high-level protocols to connectivity

Move the documentation for high-level CAN protocols (for now only covering
ISO-TP) from the peripherals section to the connectivity section.

This matches the layout in code, where the CAN controllers are under the
drivers/can directory and the protocols are under the subsys/canbus/
directory.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>

MAINTAINERS.yml

@@ -732,7 +732,8 @@ Release Notes:
   files:
     - boards/shields/mcp2515/
     - boards/shields/tcan4550evm/
-    - doc/hardware/peripherals/canbus/
+    - doc/connectivity/canbus/
+    - doc/hardware/peripherals/can/
     - drivers/can/
     - drivers/net/canbus.c
     - dts/bindings/can/

doc/connectivity/canbus/index.rst

@@ -0,0 +1,9 @@
+.. _canbus:
+
+Controller Area Network (CAN) Bus Protocols
+###########################################
+
+.. toctree::
+   :maxdepth: 2
+
+   isotp.rst

doc/connectivity/index.rst

@@ -7,6 +7,7 @@ Connectivity
    :maxdepth: 1
 
    bluetooth/index.rst
+   canbus/index.rst
    networking/index.rst
    lora_lorawan/index.rst
    usb/index.rst

doc/hardware/peripherals/can/index.rst

@@ -1,4 +1,4 @@
-.. _canbus:
+.. _can:
 
 Controller Area Network (CAN)
 #############################
@@ -7,4 +7,3 @@ Controller Area Network (CAN)
    :maxdepth: 2
 
    controller.rst
-   isotp.rst

doc/hardware/peripherals/index.rst

@@ -16,7 +16,7 @@ Peripherals
    bbram.rst
    bc12.rst
    clock_control.rst
-   canbus/index.rst
+   can/index.rst
    charger.rst
    coredump.rst
    counter.rst