Must RESET board to recover

To fix:

## Booting kernel from Legacy Image at 01000000 ...
  Image Name:   Linux-4.1.8-rt8-sdkv20-03570-gbd
  Image Type:   PowerPC Linux Kernel Image (gzip compressed)
  Data Size:    9749177 Bytes = 9.3 MiB
  Load Address: 00000000
  Entry Point:  00000000
  Verifying Checksum ... OK
## Flattened Device Tree blob at 01f00000
  Booting using the fdt blob at 0x1f00000
  Uncompressing Kernel Image ... Error: inflate() returned -3
gzip compressed: uncompress error -1
Must RESET board to recover

Move kernel and dtb load address out of the way of the uncompressed kernel:

=> setenv loadaddr 2000000; setenv fdtaddr 4000000