V4L/DVB (12734): cx25821: Fix some compilation troubles

Lindent caused some compilation breakages. There were also others
related to some other changes at kernel KABI.

There's still one missing warning fix against 2.6.30:

/home/v4l/cx25821/v4l/cx25821-alsa.c: In function 'cx25821_audio_initdev':
/home/v4l/cx25821/v4l/cx25821-alsa.c:706: warning: 'snd_card_new' is deprecated (declared at include/sound/core.h:306)

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>