board: ti: am62x: am62x.env: Fix boot_targets

ti_mmc is not a valid boot_target for standard boot flow so
remove it. Prefer mmc1 (sd-card) over mmc0 (emmc).

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Nishanth Menon <nm@ti.com>
diff --git a/board/ti/am62x/am62x.env b/board/ti/am62x/am62x.env
index 22a6c2c..e53a55c 100644
--- a/board/ti/am62x/am62x.env
+++ b/board/ti/am62x/am62x.env
@@ -8,7 +8,7 @@
 	${mtdparts}
 run_kern=booti ${loadaddr} ${rd_spec} ${fdtaddr}
 
-boot_targets=ti_mmc mmc0 mmc1 usb pxe dhcp
+boot_targets=mmc1 mmc0 usb pxe dhcp
 boot=mmc
 mmcdev=1
 bootpart=1:2