MAINTAINERS: update dlg,da72??.txt to yaml

Now the dlg,da7280.txt file has been converted to dt-schema,
update the corresponding MAINTAINERS entry.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202412070625.zZpw80SM-lkp@intel.com/
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20250306-topic-misc-da7280-convert-v4-2-2972c4e81cb5@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Author: superna9999

MAINTAINERS

@@ -6741,7 +6741,7 @@ DIALOG SEMICONDUCTOR DRIVERS
 M:	Support Opensource <support.opensource@diasemi.com>
 S:	Supported
 W:	http://www.dialog-semiconductor.com/products
-F:	Documentation/devicetree/bindings/input/dlg,da72??.txt
+F:	Documentation/devicetree/bindings/input/dlg,da72??.yaml
 F:	Documentation/devicetree/bindings/input/dlg,da9062-onkey.yaml
 F:	Documentation/devicetree/bindings/mfd/da90*.txt
 F:	Documentation/devicetree/bindings/mfd/dlg,da90*.yaml