docs(linux): U-Boot: Falcon-Mode: remove mention of DTB in OSPI

The fitImage is expected to contain the required DTB in falcon mode so
remove the ask for redundant DTB in rootfs from the docs.

Signed-off-by: Anshul Dalal <anshuld@ti.com>

Author: ArchUsr64

source/linux/Foundational_Components/U-Boot/UG-Falcon-Mode.rst

@@ -74,9 +74,9 @@ OSPI boot:
 .. ifconfig:: CONFIG_part_variant not in ('AM62AX')
 
    For OSPI boot, the ``tiboot3.bin`` and ``tifalcon.bin`` files should be
-   flashed to the same addresses in flash as regular boot flow but the DTB and
-   the ``fitImage`` are read from the rootfs's boot directory. The MMC device
-   is selected by the ``mmcdev`` env variable for R5 SPL.
+   flashed to the same addresses in flash as regular boot flow but the
+   ``fitImage`` is read from the rootfs's boot directory. The MMC device is
+   selected by the ``mmcdev`` env variable for R5 SPL.
 
    Below U-Boot commands can be used to download ``tiboot3.bin`` and
    ``tifalcon.bin`` over tftp and then flash those to OSPI at their respective