ASoC: qcom: q6afe: remove useless assignments

cppcheck warnings:

sound/soc/qcom/qdsp6/q6afe.c:848:25: note: Assignment 'p=NULL',
assigned value is 0
 struct q6afe_port *p = NULL;
                        ^
sound/soc/qcom/qdsp6/q6afe.c:854:7: note: Null pointer dereference
  if (p->token == token) {
      ^
sound/soc/qcom/qdsp6/q6afe.c:939:8: style: Redundant initialization
for 'wait'. The initialized value is overwritten before it is
read. [redundantInitialization]
  wait = &port->wait;
       ^
sound/soc/qcom/qdsp6/q6afe.c:933:26: note: wait is initialized
 wait_queue_head_t *wait = &port->wait;
                         ^
sound/soc/qcom/qdsp6/q6afe.c:939:8: note: wait is overwritten
  wait = &port->wait;
       ^
sound/soc/qcom/qdsp6/q6afe.c:1191:10: style: Redundant initialization
for 'port_id'. The initialized value is overwritten before it is
read. [redundantInitialization]
 port_id = port->id;
         ^
sound/soc/qcom/qdsp6/q6afe.c:1186:14: note: port_id is initialized
 int port_id = port->id;
             ^
sound/soc/qcom/qdsp6/q6afe.c:1191:10: note: port_id is overwritten
 port_id = port->id;
         ^

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210218222916.89809-5-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>