scsi: qedf: Use vzalloc() instead of vmalloc()/memset(0)

Use vzalloc() instead of vmalloc() and memset(0) to simpify the code.

Link: https://lore.kernel.org/r/20210518132018.1312995-1-yangyingliang@huawei.comReviewed-by: NHimanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qedf/qedf_dbg.c

@@ -106,11 +106,10 @@ qedf_dbg_info(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
 int
 qedf_alloc_grc_dump_buf(u8 **buf, uint32_t len)
 {
-		*buf = vmalloc(len);
+		*buf = vzalloc(len);
 		if (!(*buf))
 			return -ENOMEM;
 
-		memset(*buf, 0, len);
 		return 0;
 }