doc: release notes: list of ARM SoCs added during v2.2 release cycle

This commit adds the list of ARM SoCs whose support was
added during the Zephyr v2.2 release cycle.

Signed-off-by: Ioannis Glaropoulos <[email protected]>

Author: ioannisg

doc/releases/release-notes-2.2.rst

@@ -179,7 +179,19 @@ Boards & SoC Support
 
 .. rst-class:: rst-columns
 
-   * <TBD>
+   * Atmel SAM4E
+   * Atmel SAMV71
+   * Broadcom BCM58400
+   * NXP i.MX RT1011
+   * Silicon Labs EFM32GG11B
+   * Silicon Labs EFM32JG12B
+   * ST STM32F098xx
+   * ST STM32F100XX
+   * ST STM32F767ZI
+   * ST STM32L152RET6
+   * ST STM32L452XC
+   * ST STM32G031
+
 
 * Added support for these ARM boards: