environment: ti: Make get_fdt_mmc common

Since get_fdt_mmc is common, factor it out into mmc.env and remove
it from each platform env file along with changing the directory path to
reflect the standards. Use it in mmcloados but keep loadfdt
defined in case it is still used by some external uEnv.txt script.

Signed-off-by: Andrew Davis <afd@ti.com>
Signed-off-by: Manorit Chawdhry <m-chawdhry@ti.com>
diff --git a/include/environment/ti/mmc.env b/include/environment/ti/mmc.env
index 5677d05..a052d28 100644
--- a/include/environment/ti/mmc.env
+++ b/include/environment/ti/mmc.env
@@ -13,7 +13,8 @@
 	env import -t ${loadaddr} ${filesize}
 loadbootenv=fatload mmc ${mmcdev} ${loadaddr} ${bootenvfile}
 loadimage=load ${devtype} ${bootpart} ${loadaddr} ${bootdir}/${bootfile}
-loadfdt=load ${devtype} ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile}
+loadfdt=load ${devtype} ${bootpart} ${fdtaddr} ${bootdir}/dtb/${fdtfile}
+get_fdt_mmc=load mmc ${bootpart} ${fdtaddr} ${bootdir}/dtb/${name_fdt}
 envboot=mmc dev ${mmcdev};
 	if mmc rescan; then
 		echo SD/MMC found on device ${mmcdev};
@@ -32,7 +33,7 @@
 	fi;
 mmcloados=
 	if test ${boot_fdt} = yes || test ${boot_fdt} = try; then
-		if run loadfdt; then
+		if run get_fdt_mmc; then
 			bootz ${loadaddr} - ${fdtaddr};
 		else
 			if test ${boot_fdt} = try; then