board: ti: am62ax: Set fdtfile from C code instead of findfdt script

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

While at this, replace findfdt in environment with a warning as it is
no longer needed

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/board/ti/am62ax/evm.c b/board/ti/am62ax/evm.c
index cd3360a..62d3664 100644
--- a/board/ti/am62ax/evm.c
+++ b/board/ti/am62ax/evm.c
@@ -13,6 +13,8 @@
 #include <fdt_support.h>
 #include <spl.h>
 
+#include "../common/fdt_ops.h"
+
 int board_init(void)
 {
 	return 0;
@@ -27,3 +29,11 @@
 {
 	return fdtdec_setup_memory_banksize();
 }
+
+#ifdef CONFIG_BOARD_LATE_INIT
+int board_late_init(void)
+{
+	ti_set_fdt_env(NULL, NULL);
+	return 0;
+}
+#endif