ASoC: Fix NULL vs. 0 warning in SSM2602

sparse complains if 0 is used as a NULL pointer constant.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Liam Girdwood <lrg@ti.com>
1 file changed