doc: release: 3.6: Release notes for mfd and regulators

Added release notes for mfd and regulators

Signed-off-by: Andy Sinclair <[email protected]>

Author: aasinclair

doc/releases/release-notes-3.6.rst

@@ -510,6 +510,13 @@ Drivers and Sensors
   * Added xmc4xxx MDIO drivers.
   * Fixed build errors caused by mdio.h driver header not including errno.h
 
+* MFD
+
+  * Added support for :dtcompatible:`maxim,max20335`
+  * Added support for :dtcompatible:`adi,ad5592`
+  * Added separate initialisation priorities for :dtcompatible:`nordic,npm1300` and
+    :dtcompatible:`nordic,npm6001`
+
 * PCIE
 
   * Fixed MMIO size calculation by disabling IO/memory decoding beforehand.
@@ -544,6 +551,19 @@ Drivers and Sensors
 
 * Regulators
 
+  * Added new API functions
+    * :c:func:`regulator_set_active_discharge`
+    * :c:func:`regulator_get_active_discharge`
+    * :c:func:`regulator_list_current_limit`
+  * ``startup-delay-us`` and ``off-on-delay-us`` are now supported for all regulators
+  * Added non-multithreading support
+  * Added support for :dtcompatible:`maxim,max20335-regulator`
+  * Added ASYS UVLO configuration for :dtcompatible:`nxp,pca9420`
+  * Added LDO/DCDC support for :dtcompatible:`renesas,smartbond-regulator`
+  * Added LDO soft start configuration for :dtcompatible:`nordic,npm1300-regulator`
+  * Fixed init priority for :dtcompatible:`x-powers,axp192-regulator`
+  * Fixed LDO GPIO control for :dtcompatible:`nordic,npm1300-regulator`
+
 * Reset
 
 * Retained memory