scsi: be2iscsi: Fix misdocumentation of 'pcontext'

Also demote unintentional kerneldoc header.

Fixes the following W=1 kernel build warning(s):

 drivers/scsi/be2iscsi/be_main.c:986: warning: Function parameter or member 'pcontext' not described in 'alloc_wrb_handle'
 drivers/scsi/be2iscsi/be_main.c:986: warning: Excess function parameter 'pwrb_context' description in 'alloc_wrb_handle'
 drivers/scsi/be2iscsi/be_main.c:1409: warning: Function parameter or member 'beiscsi_conn' not described in 'beiscsi_complete_pdu'
 drivers/scsi/be2iscsi/be_main.c:1409: warning: Function parameter or member 'phdr' not described in 'beiscsi_complete_pdu'
 drivers/scsi/be2iscsi/be_main.c:1409: warning: Function parameter or member 'pdata' not described in 'beiscsi_complete_pdu'
 drivers/scsi/be2iscsi/be_main.c:1409: warning: Function parameter or member 'dlen' not described in 'beiscsi_complete_pdu'

Link: https://lore.kernel.org/r/20200713080001.128044-19-lee.jones@linaro.org
Cc: Subbu Seetharaman <subbu.seetharaman@broadcom.com>
Cc: Ketan Mukadam <ketan.mukadam@broadcom.com>
Cc: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Cc: linux-drivers@broadcom.com
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/be2iscsi/be_main.c

@@ -977,7 +977,7 @@ beiscsi_get_wrb_handle(struct hwi_wrb_context *pwrb_context,
  * alloc_wrb_handle - To allocate a wrb handle
  * @phba: The hba pointer
  * @cid: The cid to use for allocation
- * @pwrb_context: ptr to ptr to wrb context
+ * @pcontext: ptr to ptr to wrb context
  *
  * This happens under session_lock until submission to chip
  */
@@ -1394,7 +1394,7 @@ static void hwi_complete_cmd(struct beiscsi_conn *beiscsi_conn,
 	spin_unlock_bh(&session->back_lock);
 }
 
-/**
+/*
  * ASYNC PDUs include
  * a. Unsolicited NOP-In (target initiated NOP-In)
  * b. ASYNC Messages