staging: bcm2835-audio: Rewrite comparison to NULL

Fixes checkpatch check "Comparison to NULL could be written '!chip'".

Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Simon Sandström 2017-02-07 12:02:43 +01:00 • committed by Greg Kroah-Hartman
commit ab601be466