board: beagle: beagleboneai64: Set fdtfile from C code instead of findfdt script

Stop using the findfdt script and switch to setting the fdtfile from C
code.

Reviewed-by: Jonathan Humphreys <j-humphreys@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: Nishanth Menon <nm@ti.com>
diff --git a/configs/j721e_beagleboneai64_a72_defconfig b/configs/j721e_beagleboneai64_a72_defconfig
index 4b019fa..3f06138 100644
--- a/configs/j721e_beagleboneai64_a72_defconfig
+++ b/configs/j721e_beagleboneai64_a72_defconfig
@@ -34,7 +34,8 @@
 CONFIG_AUTOBOOT_DELAY_STR="d"
 CONFIG_AUTOBOOT_STOP_STR=" "
 CONFIG_OF_SYSTEM_SETUP=y
-CONFIG_BOOTCOMMAND="run set_led_state_start_load;run findfdt; run envboot; bootflow scan -lb;run set_led_state_fail_load"
+CONFIG_BOOTCOMMAND="run set_led_state_start_load; run envboot; bootflow scan -lb;run set_led_state_fail_load"
+CONFIG_BOARD_LATE_INIT=y
 CONFIG_LOGLEVEL=7
 CONFIG_SPL_MAX_SIZE=0xc0000
 CONFIG_SPL_HAS_BSS_LINKER_SECTION=y