boards: s32z270dc2_r52: document supported features

Document supported features and do minor refactoring.

Signed-off-by: Manuel Arguelles <manuel.arguelles@nxp.com>

Author: manuargue

boards/arm/s32z270dc2_r52/doc/index.rst

@@ -29,18 +29,24 @@ The boards support the following hardware features:
 +-----------+------------+-------------------------------------+
 | Interface | Controller | Driver/Component                    |
 +===========+============+=====================================+
-| GIC       | on-chip    | interrupt_controller                |
+| Arm GIC   | on-chip    | interrupt_controller                |
 +-----------+------------+-------------------------------------+
-| ARM Timer | on-chip    | timer                               |
+| Arm Timer | on-chip    | timer                               |
++-----------+------------+-------------------------------------+
+| LINFlexD  | on-chip    | serial                              |
++-----------+------------+-------------------------------------+
+| MRU       | on-chip    | mbox                                |
++-----------+------------+-------------------------------------+
+| NETC      | on-chip    | ethernet                            |
+|           |            |                                     |
+|           |            | mdio                                |
 +-----------+------------+-------------------------------------+
 | SIUL2     | on-chip    | pinctrl                             |
 |           |            |                                     |
 |           |            | gpio                                |
 |           |            |                                     |
 |           |            | external interrupt controller       |
 +-----------+------------+-------------------------------------+
-| LINFlexD  | on-chip    | serial                              |
-+-----------+------------+-------------------------------------+
 | SPI       | on-chip    | spi                                 |
 +-----------+------------+-------------------------------------+
 | SWT       | on-chip    | watchdog                            |
@@ -110,8 +116,17 @@ remaining are disabled and not configured.
 Watchdog
 ========
 
-Currently Watchdog only supports interrupt triggering, but does not support
-reset function because currently the board does not support running on flash.
+The watchdog driver only supports triggering an interrupt upon timer expiration.
+Zephyr is currently running from SRAM on this board, thus system reset is not
+supported.
+
+Ethernet
+========
+
+NETC driver supports to manage the Physical Station Interface (PSI0) and/or a
+single Virtual SI (VSI). The rest of the VSI's shall be assigned to different
+cores of the system. Refer to :ref:`nxp_s32_netc-samples` to learn how to
+configure the Ethernet network controller.
 
 Programming and Debugging
 *************************

samples/boards/nxp_s32/netc/README.rst

@@ -1,4 +1,4 @@
-.. nxp_s32_netc-samples:
+.. _nxp_s32_netc-samples:
 
 NXP S32 NETC Sample Application
 ###############################