staging: bcm2835-audio: Drop unnecessary pcm indirect setup

The hw_queue_size of PCM indirect helper doesn't need to be set up if
you use the whole given buffer size.  Drop the useless
initialization, which just confuses readers.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>