Move the existing files for STM32MP13x and STM32MP15x in the
folder "st".
Rename the board files using the correct names.
While there, add the missing URL to one of the boards.
Change-Id: If8b92f55e3390ebc75df6a2ea09fcf798ea0b8cf
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/8982
Tested-by: jenkins
Reviewed-by: zapb <dev@zapb.de>
