[PATCH v4] iio: patch set ltc2632

[Chris Ruehl]

Patchset to extend ltc2632 spi driver to support the similar chip set
ltc2634.
* Patch v2 1/3 update documentation struct ltc2632_chip_info
* Patch v2 2/3 patch ltc2632.c,Kconfig,ltc2632.txt(devtree)
* Patch v2 3/3 convert ltc2632.txt to yaml format named lltc,ltc2632.yaml

* Patch v3 2/3 : correct help text

* Patch v4 1/3 : correct spelling in commit
           */3  hide change history below --- 

Signed-off-by: Chris Ruehl <chris.ruehl@xxxxxxxxxxxx>
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