There was a mix of UTF-8 and ISO-8859 files in the U-Boot source
tree, which could cause issues with the patchwork review system.
This commit converts all ISO-8859 files to UTF-8.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>

Make the copyright notices in the x86 files consistent and update them with
proper attributions for recent updates

Also fix a few comment style/accuracy and whitespace/blank line issues

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>