MAINTAINERS: Add entry for ULTRATRONIK BOARD SUPPORT

Add a new MAINTAINERS section for the ULTRATRONIK BOARD SUPPORT, covering
the stm32mp157c-ultra-fly-sbc.dts board support file.

This ensures that maintainers of this board are properly listed and can be
notified for any relevant changes.

Signed-off-by: Goran Rađenović <[email protected]>
Signed-off-by: Börge Strümpfel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexandre Torgue <[email protected]>

Author: Goran Rađenović

MAINTAINERS

@@ -24752,6 +24752,12 @@ S:	Maintained
 F:	drivers/usb/common/ulpi.c
 F:	include/linux/ulpi/
 
+ULTRATRONIK BOARD SUPPORT
+M:	Goran Rađenović <[email protected]>
+M:	Börge Strümpfel <[email protected]>
+S:	Maintained
+F:	arch/arm/boot/dts/st/stm32mp157c-ultra-fly-sbc.dts
+
 UNICODE SUBSYSTEM
 M:	Gabriel Krisman Bertazi <[email protected]>
 L:	[email protected]