ASoC: hdac_hdmi: Potential NULL deref in hdac_hdmi_get_spk_alloc()

We intended || here instead of &&.  The original code potentially leads
to a NULL dereference.

Fixes: 2889099e

 ('ASoC: hdac_hdmi: Register chmap controls and ops')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewd-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Tested-by: Sachin Mokashi <sachinx.mokashi@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>