am335x_shc: Stop disabling device tree relocation

Remove setting of fdt_high to ~0, which disables device tree relocation,
from the default environment. Doing so prevents U-Boot from correcting
problems such as having an unaligned device tree and leads to various
failure modes in the OS.

Reviewed-by: Heiko Schocher <hs@nabladev.com>
Signed-off-by: Tom Rini <trini@konsulko.com>

include/configs/am335x_shc.h

@@ -25,7 +25,6 @@
 	"loadaddr=0x80200000\0" \
 	"kloadaddr=0x84000000\0" \
 	"fdtaddr=0x85000000\0" \
-	"fdt_high=0xffffffff\0" \
 	"rdaddr=0x81000000\0" \
 	"bootfile=uImage\0" \
 	"fdtfile=am335x-shc.dtb\0" \