Document the new nvmem kernel APIs.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This is a minor patch that fixes the following typo in the NVMEM documentation:

When a consumers no longer needs the NVMEM

to,

When a consumer no longer needs the NVMEM

Signed-off-by: Narendran Sankaran <naren.kernel@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

This patch add basic how-to and api summary documentation for simple
NVMEM framework.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>