[BUGFIX] Adjust styles for EB-logo in BE

Remove inline-styles as the default-style
is "okay" for a simple name as a "logo".

Change-Id: Icc3d8fd9349f03d200e2db9c677d3f26b21f7642
Resolves: #60478
Reviewed-on: http://review.typo3.org/31729
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>