DEVELOPERS: added marleen.vos@mind.be for boards/configs based on stm32mp15

The buildroot manual says this kind of commit should be done together
with the actual changes made to a config/board. But since a number of
changes will follow for some boards and configs, it seemed more
logical to make a separate commit for this.

Signed-off-by: Marleen Vos <marleen.vos@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -2089,6 +2089,12 @@ F:	board/qemu/riscv64-virt/
 F:	configs/qemu_riscv32_virt_defconfig
 F:	configs/qemu_riscv64_virt_defconfig
 
+N:	Marleen Vos <marleen.vos@mind.be>
+F:	board/stmicroelectronics/common/stm32mp157/
+F:	configs/avenger96_defconfig
+F:	configs/stm32mp157a_dk1_defconfig
+F:	configs/stm32mp157c_dk2_defconfig
+
 N:	Martin Bark <martin@barkynet.com>
 F:	board/raspberrypi/
 F:	configs/raspberrypi3_defconfig