[CLEANUP] Add missing PHP comments in class LogoView

Change-Id: I13d428c7b8a3964e8c376ad2c8d2a4af8c0059f1
Releases: 6.2
Resolves: #59374
Reviewed-on: https://review.typo3.org/30596
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters