MAINTAINERS: add MFD dt-bindings headers to the area

add include/zephyr/dt-bindings/mfd under MFD area

Signed-off-by: Benjamin Cabé <[email protected]>

Author: kartben

MAINTAINERS.yml

@@ -1914,6 +1914,7 @@ Documentation Infrastructure:
   files:
     - drivers/mfd/
     - include/zephyr/drivers/mfd/
+    - include/zephyr/dt-bindings/mfd/
     - dts/bindings/mfd/
     - tests/drivers/build_all/mfd/
   labels: