[PATCH 19/24] binman: Allow different operations in FIT generator nodes

[Simon Glass]

At present we only support expanding out FDT nodes. Make the operation
into an @operation property, so that others can be supported.

Re-arrange and tidy up the documentation so that it has separate
headings for each topic.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 tools/binman/entries.rst               |  85 +++++++++++-----
 tools/binman/etype/fit.py              | 136 ++++++++++++++++++++-----
 tools/binman/ftest.py                  |   7 ++
 tools/binman/test/220_fit_bad_oper.dts |  27 +++++
 4 files changed, 206 insertions(+), 49 deletions(-)
 create mode 100644 tools/binman/test/220_fit_bad_oper.dts

Applied to u-boot-dm, thanks!