scsi: lpfc: lpfc_debugfs: Fix a couple of function documentation issues

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

 drivers/scsi/lpfc/lpfc_debugfs.c:4204: warning: Function parameter or member 'len' not described in 'lpfc_idiag_queacc_read_qe'
 drivers/scsi/lpfc/lpfc_debugfs.c:4781: warning: Function parameter or member 'ctlregid' not described in 'lpfc_idiag_ctlacc_read_reg'
 drivers/scsi/lpfc/lpfc_debugfs.c:4781: warning: Excess function parameter 'drbregid' description in 'lpfc_idiag_ctlacc_read_reg'

Link: https://lore.kernel.org/r/20201102142359.561122-7-lee.jones@linaro.org
Cc: James Smart <james.smart@broadcom.com>
Cc: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_debugfs.c

@@ -4186,6 +4186,7 @@ lpfc_idiag_que_param_check(struct lpfc_queue *q, int index, int count)
 /**
  * lpfc_idiag_queacc_read_qe - read a single entry from the given queue index
  * @pbuffer: The pointer to buffer to copy the read data into.
+ * @len: Length of the buffer.
  * @pque: The pointer to the queue to be read.
  * @index: The index into the queue entry.
  *
@@ -4762,7 +4763,7 @@ lpfc_idiag_drbacc_write(struct file *file, const char __user *buf,
  * @phba: The pointer to hba structure.
  * @pbuffer: The pointer to the buffer to copy the data to.
  * @len: The length of bytes to copied.
- * @drbregid: The id to doorbell registers.
+ * @ctlregid: The id to doorbell registers.
  *
  * Description:
  * This routine reads a control register and copies its content to the