doc: release: 3.2: add a bunch of placeholders

Add few subsystem and driver placeholder for the maintainers to add
their notes. Hopefully it would help reducing merge conflicts on release
notes PRs.

Signed-off-by: Fabio Baltieri <[email protected]>

Author: fabiobaltieri

doc/releases/release-notes-3.2.rst

@@ -155,12 +155,20 @@ Kernel
 Architectures
 *************
 
+* ARC
+
 * ARM
 
   * AARCH32
 
   * AARCH64
 
+* Posix
+
+* RISC-V
+
+* x86
+
 * Xtensa
 
 Bluetooth
@@ -224,6 +232,8 @@ Drivers and Sensors
 
 * ADC
 
+* Audio
+
 * CAN
 
   * A driver for bridging from :ref:`native_posix` to Linux SocketCAN has been added.
@@ -240,10 +250,20 @@ Drivers and Sensors
     controller driver, has been moved to :zephyr_file:`drivers/net/canbus.c` and can now be enabled
     using :kconfig:option:`CONFIG_NET_CANBUS`.
 
+* Clock Control
+
+* Coredump
+
 * Counter
 
+* Crypto
+
 * DAC
 
+* DAI
+
+* Display
+
 * Disk
 
 * DMA
@@ -255,6 +275,8 @@ Drivers and Sensors
 
 * Entropy
 
+* ESPI
+
 * Ethernet
 
 * Flash
@@ -265,20 +287,40 @@ Drivers and Sensors
 
   * Added GPIO driver for Renesas Smartbond platform
 
+* HWINFO
+
 * I2C
 
 * I2S
 
+* I3C
+
 * IEEE 802.15.4
 
   * All IEEE 802.15.4 drivers have been converted to Devicetree-based drivers.
 
 * Interrupt Controller
 
+* IPM
+
+* LED
+
+* LoRa
+
 * MBOX
 
 * MEMC
 
+* MM
+
+* Modem
+
+* PCIE
+
+* PECI
+
+* Pinmux
+
 * Pin control
 
   * Added pin control driver for Renesas Smartbond platform
@@ -287,6 +329,12 @@ Drivers and Sensors
 
   * Added PWM driver for Renesas R-Car platform
 
+* Power Domain
+
+* Reset
+
+* SDHC
+
 * Sensor
 
 * Serial
@@ -299,10 +347,14 @@ Drivers and Sensors
 
 * USB
 
+* W1
+
 * Watchdog
 
   * Added support for Raspberry Pi Pico watchdog.
 
+* WiFi
+
 Networking
 **********
 
@@ -329,6 +381,18 @@ Devicetree
 Libraries / Subsystems
 **********************
 
+* Console
+
+* C Library
+
+* C++ Subsystem
+
+* Emul
+
+* Filesystem
+
+* IPC
+
 * Management
 
   * MCUMGR race condition when using the task status function whereby if a
@@ -364,9 +428,57 @@ Libraries / Subsystems
   * Added :c:macro:`LOG_RAW` for logging strings without additional formatting.
     It is similar to :c:macro:`LOG_PRINTK` but do not append ``<cr>`` when new line is found.
 
+* LoRaWAN
+
+* Modbus
+
+* Power management
+
+* RTIO
+
+* SD Subsystem
+
+* Settings
+
+* Shell
+
+* Storage
+
+* Testsuite
+
+* Tracing
+
 HALs
 ****
 
+* Atmel
+
+* Espressif
+
+* GigaDevice
+
+* NXP
+
+* Nordic
+
+* RPi Pico
+
+* Renesas
+
+* ST
+
+* STM32
+
+* Silabs
+
+* TI
+
+* Telink
+
+* Wurth Elektronik
+
+* Xtensa
+
 MCUboot
 *******