[U-Boot] FDT retrived raspberry pi bootargs length > 350 characters cause setenv errors, sequemce fdt get/ set/ get truncates at the first blank in the string.

[dh at synoia.com]

Imove the fdt to 0x100
fdt move ${fdt_addr}  100
fdt addr 100
 
then
fdt get value bootargs /chosen bootargs
printenv bootargs 

8250.nr_uarts=0 dma.dmachans=0x7f35 bcm2708_fb.fbwidth=3840 bcm2708_fb.fbheight=2160 bcm2709.boardrev=0xa02082 bcm2709.serial=0x998f552d smsc95xx.macaddr=B8:27:EB:8F:55:2D bcm2708_fb.fbswap=1 bcm2709.uart_clock=48000000 vc_mem.mem_base=0x3dc00000 vc_mem.mem_size=0x3f000000  dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
1 ) Note: bootargs is over 480 characters long

setenv abc $bootargs fails...when bootargs is over 350 (approx) characters long. 
fdt set bootargs /chosen bootargs 
fdt get value bootargs /chosen bootargsbootargs=8250.nr_uarts=0Bootargs is truncated
The PI firmware generated bootargs parameters have blanks in the bootargs line. 
nvalue.c implements setenv in the _do_env_set()  routine, but I cannot find a length limit in that routine.
I'm willing to make the changes and test them.

Thanks Duncan