staging: bcm2835-audio: Propagate parameter setup error

commit fee5638fe552ff8222c3a5bdcc4a34255e248d8c upstream.

When the parameter setup fails, the driver should propagate the error
code instead of silently ignoring it.

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>