MAINTAINERS.yml: Update collaborators for mfd drivers

Add nordic-auko and seov-nordic as collaborators for
Drivers: MFD in MAINTAINERS.yml file.

Signed-off-by: Audun Korneliussen <audun.korneliussen@nordicsemi.no>

Author: nordic-auko

MAINTAINERS.yml

@@ -1838,6 +1838,8 @@ Release Notes:
   status: odd fixes
   collaborators:
     - aasinclair
+    - nordic-auko
+    - seov-nordic
   files:
     - drivers/mfd/
     - include/zephyr/drivers/mfd/