[PATCH v4 0/4] Add support channel with to iwinfo

[Ansuel Smith]

This series modify 2 different repo. Iwinfo and Rpcd
The 2 iwinfo patch add support to iwinfo to display and export channel
width and center_channel info for both wifi scan and wifi info related
to the local wifi.
The other 2 rpcd patch export the iwinfo data to ubus to make them
usable by the webui.

v4:
- Fix error in iwinfo_cli
v3:
- Add check for center_chan support in iwinfo_cli
- Use uinit to represent chan width and add function format_chant_width
v2:
- Put the static char array to the iwinfo include. (the rpcd plugin use
the same include)
- Add additional patch to export center_chanl for local wifi.

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2.29.2