i2c: Clean up <linux/i2c.h>
i2c: Clean up <linux/i2c.h>

Fix most checkpatch.pl errors and warnings. This includes replacing
spaces with tabs in many places, adding and removing spaces, and
folding long lines.

Also complete a couple prototypes to make it clearer what the
parameters represent.

Signed-off-by: Jean Delvare <49ad6a9f5aa17024c23048df346d55bda6837e01@linux-fr.org>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs