qcacmn: Avoid using freed pdev in dp_rx_bar_stats_cb

dp_reo_cmdlist_destroy frees any pending reo_cmds.
Each reo_cmd is associated with a handler which takes
reo_cmd->data as an input. This reo_cmd->data is a pdev
for dp_rx_bar_stats_cb. So validate pdev before
accessing it further.

Change-Id: I1c2d46d3e3f5ede4491500978153f501ebdeee87
CRs-Fixed: 2478910
2 files changed