board: ti: am62p|j722s: Add ti_set_fdt_env for fdtfile

stdboot and legacy boot depend on fdtfile. Since findfdt is getting
deprecated, move the rest of k3 platforms dependent on findfdt to
ti_set_fdt_env.

Populate fdtfile by calling ti_set_fdt_env in board files.

Signed-off-by: Manorit Chawdhry <m-chawdhry@ti.com>
diff --git a/board/ti/am62px/evm.c b/board/ti/am62px/evm.c
index 1a2c46c..7362fa4 100644
--- a/board/ti/am62px/evm.c
+++ b/board/ti/am62px/evm.c
@@ -13,6 +13,7 @@
 #include <env.h>
 #include <fdt_support.h>
 #include <spl.h>
+#include "../common/fdt_ops.h"
 
 struct efi_fw_image fw_images[] = {
 	{
@@ -61,3 +62,11 @@
 {
 	return fdtdec_setup_memory_banksize();
 }
+
+#if IS_ENABLED(CONFIG_BOARD_LATE_INIT)
+int board_late_init(void)
+{
+	ti_set_fdt_env(NULL, NULL);
+	return 0;
+}
+#endif
diff --git a/board/ti/j722s/evm.c b/board/ti/j722s/evm.c
index 515aaa8..29e06a5 100644
--- a/board/ti/j722s/evm.c
+++ b/board/ti/j722s/evm.c
@@ -12,6 +12,7 @@
 #include <env.h>
 #include <fdt_support.h>
 #include <spl.h>
+#include "../common/fdt_ops.h"
 
 int board_init(void)
 {
@@ -27,3 +28,11 @@
 {
 	return fdtdec_setup_memory_banksize();
 }
+
+#if IS_ENABLED(CONFIG_BOARD_LATE_INIT)
+int board_late_init(void)
+{
+	ti_set_fdt_env(NULL, NULL);
+	return 0;
+}
+#endif