V4L/DVB (11083): au0828: remove some unneeded braces

There were some braces left behind from when there was more code in the block.
Remove it.

Thanks to Mauro Carvalho Chehab <mchehab@infradead.org> for pointing this out.

Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>