Certain TI K3 devices such as AM62x and AM62Ax require a Device Manager
(DM) firmnware to be made available to the U-Boot build, which will get
packaged into the "tispl.bin" image tree blob during A53 SPL build.
Without that DM firmware U-Boot will not be functional. To support this,
add a config option called BR2_TARGET_UBOOT_NEEDS_TI_K3_DM to enable
this feature, and another option BR2_TARGET_UBOOT_TI_K3_DM_SOC to allow
setting the name of the SOC which needs to match the corresponding
folder name in the ti-linux-firmware Git repository.
Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>