doc: releases: release-notes-4.3.rst

add release note for STM32 EXTI driver

Signed-off-by: Alexander Kozhinov <[email protected]>

Author: KozhinovAlexander

doc/releases/release-notes-4.3.rst

@@ -90,6 +90,22 @@ New Drivers
   Same as above for boards, this will also be recomputed at the time of the release.
   Just link the driver, further details go in the binding description
 
+* Interrupt controller
+
+   * :dtcompatible:`st,stm32-exti`
+   * Splitted STM32 EXTI driver from GPIO driver into a separate driver.
+
+* GPIO
+
+   * :dtcompatible:`st,stm32-gpio`
+   * Integrated STM32 EXTI driver.
+
+* RTC
+
+   * :dtcompatible:`st,stm32-rtc`
+   * Integrated STM32 EXTI driver.
+
+
 New Samples
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