drivers/edac/i3000: document type promotion
drivers/edac/i3000: document type promotion

By popular request, add a comment documenting the implicit type promotion
here.

Signed-off-by: Jason Uhlenkott <ba1e0016480b9891e24c38f55a94a0a9ce6c897e@akamai.com>
Signed-off-by: Doug Thompson <35920ba1a7821e73308e9ec6cecac34ddd29c0c4@xmission.com>
Signed-off-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org>
Signed-off-by: Linus Torvalds <69652caca27c8b940640ad396ab71f93cacec34f@linux-foundation.org>

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