board: ti: am65x: Set fdtfile from C code instead of findfdt script

We now can provide a map and have the standard fdtfile variable set from
code itself. This allows for bootstd to "just work".

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>

board/ti/am65x/am65x.env

@@ -5,9 +5,6 @@
 #include <env/ti/k3_rproc.env>
 #endif
 
-findfdt=
-	setenv name_fdt ti/k3-am654-base-board.dtb;
-	setenv fdtfile ${name_fdt}
 name_kern=Image
 console=ttyS2,115200n8
 args_all=setenv optargs ${optargs} earlycon=ns16550a,mmio32,0x02800000

board/ti/am65x/evm.c

@@ -22,6 +22,7 @@
 #include <linux/printk.h>
 
 #include "../common/board_detect.h"
+#include "../common/fdt_ops.h"
 
 #define board_is_am65x_base_board()	board_ti_is("AM6-COMPROCEVM")
 
@@ -141,6 +142,7 @@ static void setup_board_eeprom_env(void)
 
 invalid_eeprom:
 	set_board_info_env_am6(name);
+	ti_set_fdt_env(NULL, NULL);
 }
 
 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)