STM32MP15x and STM32MP13 can use almost of the same configuration regarding bootloaders and the Linux kernel. To make profit of the commont folder, rename it to 'stm32mp1xx' and change dependencies accordingly. Signed-off-by: Raphael Gallais-Pou <rgallaispou@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>