[PATCH] i2c cleanup : typos and whitespace

[PATCH] i2c cleanup : typos and whitespace

Trivial changes picked from the i2c SVN repository. This includes:
* Documentation updates
* Comment updates
* Whitespace changes
* Typo fixes in strings and comments
* Includes reordering
* Drop of includes and comments relative to kernel version 2.0 to 2.3
The idea is to minimize the meaningless differences between both theres
so that real differences are easier to see.

Signed-off-by: Jean Delvare <khali@linux-fr.org>