environment: ti: Prefix ARM64 DTB names with directory

In Linux the ARM64 DTSs are stored in vendor directories to help organize
the files and prevent naming collisions. The deployed DTBs will mirror
this and so the vendor prefix should be added to the variable used to
locate these files.

Suggested-by: Ryan Eatmon <reatmon@ti.com>
Signed-off-by: Andrew Davis <afd@ti.com>
Signed-off-by: Manorit Chawdhry <m-chawdhry@ti.com>
Reviewed-by: Nikhil M Jain <n-jain1@ti.com>
diff --git a/board/ti/j721s2/j721s2.env b/board/ti/j721s2/j721s2.env
index f446777..67953d3 100644
--- a/board/ti/j721s2/j721s2.env
+++ b/board/ti/j721s2/j721s2.env
@@ -7,13 +7,13 @@
 #include <environment/ti/k3_rproc.env>
 #endif
 
-default_device_tree=k3-j721s2-common-proc-board.dtb
+default_device_tree=ti/k3-j721s2-common-proc-board.dtb
 findfdt=
 	setenv name_fdt ${default_device_tree};
 	if test $board_name = j721s2; then			\
-		setenv name_fdt k3-j721s2-common-proc-board.dtb; fi;
+		setenv name_fdt ti/k3-j721s2-common-proc-board.dtb; fi;
 	if test $board_name = am68-sk; then
-		setenv name_fdt k3-am68-sk-base-board.dtb; fi;
+		setenv name_fdt ti/k3-am68-sk-base-board.dtb; fi;
 	setenv fdtfile ${name_fdt}
 name_kern=Image
 console=ttyS2,115200n8