pico-imx7d: 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.

Signed-off-by: Tom Rini <trini@konsulko.com>

include/configs/pico-imx7d.h

@@ -56,7 +56,6 @@
 	"splashpos=m,m\0" \
 	"splashimage=" __stringify(CONFIG_SYS_LOAD_ADDR) "\0" \
 	"console=ttymxc4\0" \
-	"fdt_high=0xffffffff\0" \
 	"initrd_high=0xffffffff\0" \
 	"fdtfile=" CONFIG_DEFAULT_FDT_FILE "\0" \
 	"videomode=video=ctfb:x:800,y:480,depth:24,mode:0,pclk:30000,le:46,ri:210,up:22,lo:23,hs:20,vs:10,sync:0,vmode:0\0" \