[U-Boot] [PATCH v3 1/2] fit: Support compression for non-kernel components (e.g. FDT)

[Julius Werner]

> Is there a change log for this patch?I think we discussed having a test.

Sorry, forgot that. Is it okay if I just put it here or do you need me
to resend a v4?

---
Changes for v2:
  - made decompression work for all non-kernel images, not just FDTs
Changes for v3:
  - fixed up debug output that was still written for v1
  - fixed a mistake with handling FIT_LOAD_OPTIONAL_NON_ZERO when
'load' was 0 (i.e. unset)
  - added compression test case to test_fit