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 <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Neil Armstrong <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Dmitry Torokhov <[email protected]>

Author: superna9999

MAINTAINERS

@@ -6741,7 +6741,7 @@ DIALOG SEMICONDUCTOR DRIVERS
 M:	Support Opensource <[email protected]>
 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