qat: fix null pointer dereferencing
qat: fix null pointer dereferencing

Fix null pointer dereferencing while clearing session

Coverity issue: 126586
Fixes: 1703e94ac5ce ("qat: add driver for QuickAssist devices")

Signed-off-by: Deepak Kumar Jain <9bf453c83e22b0c9e2b3754d419540ea41e2427f@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk