soundwire: stream: fix out of boundary access on port properties

Assigning local iterator to array element and using it again for
indexing would cross the array boundary.
Fix this by directly referring array element without using the local
variable.
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: NPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: NVinod Koul <vkoul@kernel.org>

drivers/soundwire/stream.c

@@ -1406,9 +1406,7 @@ struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave,
 	}
 
 	for (i = 0; i < num_ports; i++) {
-		dpn_prop = &dpn_prop[i];
-
-		if (dpn_prop->num == port_num)
+		if (dpn_prop[i].num == port_num)
 			return &dpn_prop[i];
 	}