QAT: Fix uninitialized seed in QAT compression

CpaDcRqResults have to be initialized with checksum=1 for adler32.
Otherwise when error CPA_DC_OVERFLOW occurred, the next compress
operation will continue on previously part-compressed data, and write
invalid checksum data. When zfs decompress the compressed data, a
invalid checksum will occurred and lead to openzfs#14463

Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: Weigang Li <weigang.li@intel.com>
Reviewed-by: Chengfei Zhu <chengfeix.zhu@intel.com>
Signed-off-by: naivekun <naivekun0817@gmail.com>
Closes openzfs#14632
Closes openzfs#14463

module/os/linux/zfs/qat_compress.c

@@ -247,7 +247,7 @@ qat_compress_impl(qat_compress_dir_t dir, char *src, int src_len,
 	Cpa8U *buffer_meta_src = NULL;
 	Cpa8U *buffer_meta_dst = NULL;
 	Cpa32U buffer_meta_size = 0;
-	CpaDcRqResults dc_results;
+	CpaDcRqResults dc_results = {.checksum = 1};
 	CpaStatus status = CPA_STATUS_FAIL;
 	Cpa32U hdr_sz = 0;
 	Cpa32U compressed_sz;