video: fbdev: vesafb: fix indentation issue

There are a couple of statements that are indented too deeply, fix
this by removing tabs. Also add a space after a comma to clean up
a cppcheck warning.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>