MFC r327220-r327221

r327220:
Update the FDT example for the lm75 sensor to match current devicetree
standards and what the existing driver expects.

Also change 'like' to 'such as' where the text is providing an example
rather than a simile.

r327221:
Complete the changing of the old "i2c-address" property to the modern "reg"
property by updating the description text to match the updated example.

This should have been part of r327220

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

use .Mt to mark up email addresses consistently (final part)

PR: 191174
Submitted by: Franco Fichtner <franco at lastsummer.de>

Typo fixes and some language/punctuation improvements.

Add the lm75 i2c digital temperature sensor driver.

This driver supports the low and high precision models (9 and 11 bits) and
it will auto-detect the both variants.

The driver expose the temperature registers (actual temperature, shutdown
and hysteresys temperature) and also the configuration register.

It was tested on FDT systems: RPi, BBB and on non-FDT systems: AR71xx, with
both, hardware i2c controllers (when available) and gpioiic(4).

This provides a simple and cheap way for verifying the i2c bus on embedded
systems.