fix(u-boot): fix incorrect bootflow diagram in AM62D/AM62P/AM62L docs

Generic K3 bootflow diagram was inappropriately included in SoC
variants where it doesn't apply. Each SoC family has its own specific
boot flow sequence already documented, making this common block
redundant and misleading.

Signed-off-by: Vishal Mahaveer <vishalm@ti.com>

Author: vishalmti

source/linux/Foundational_Components/U-Boot/BG-Bootflow-K3.rst

@@ -9,7 +9,7 @@ bootloader has to run on R5 core. In order to meet this constraint, keeping
 safety in picture and to have faster boot time, the software boot architecture
 is designed as below:
 
-.. ifconfig:: CONFIG_part_family not in ('J7_family', 'AM64X_family', 'AM62X_family', 'AM62AX_family')
+.. ifconfig:: CONFIG_part_family not in ('J7_family', 'AM64X_family', 'AM62X_family', 'AM62AX_family', 'AM62DX_family', 'AM62PX_family', 'AM62LX_family')
 
    .. code-block:: text