[U-Boot] [PATCH v2 32/37] patman: Add a function to write ifwitool

[sjg at google.com]

This tool has quite a few arguments and options, so put the functionality
in a function so that we call it from one place and hopefully get it
right.

Signed-off-by: Simon Glass <sjg at chromium.org>
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Changes in v2: None

 tools/patman/tools.py | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

Applied to u-boot-dm, thanks!