scsi: aacraid: Fill in the very parameter descriptions for rx_sync_cmd()

... and document aac_rx_ioremap() 'dev' param.

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

 drivers/scsi/aacraid/rx.c:156: warning: Function parameter or member 'p2' not described in 'rx_sync_cmd'
 drivers/scsi/aacraid/rx.c:156: warning: Function parameter or member 'p3' not described in 'rx_sync_cmd'
 drivers/scsi/aacraid/rx.c:156: warning: Function parameter or member 'p4' not described in 'rx_sync_cmd'
 drivers/scsi/aacraid/rx.c:156: warning: Function parameter or member 'p5' not described in 'rx_sync_cmd'
 drivers/scsi/aacraid/rx.c:156: warning: Function parameter or member 'p6' not described in 'rx_sync_cmd'
 drivers/scsi/aacraid/rx.c:156: warning: Function parameter or member 'status' not described in 'rx_sync_cmd'
 drivers/scsi/aacraid/rx.c:156: warning: Function parameter or member 'r1' not described in 'rx_sync_cmd'
 drivers/scsi/aacraid/rx.c:156: warning: Function parameter or member 'r2' not described in 'rx_sync_cmd'
 drivers/scsi/aacraid/rx.c:156: warning: Function parameter or member 'r3' not described in 'rx_sync_cmd'
 drivers/scsi/aacraid/rx.c:156: warning: Function parameter or member 'r4' not described in 'rx_sync_cmd'
 drivers/scsi/aacraid/rx.c:156: warning: Excess function parameter 'ret' description in 'rx_sync_cmd'
 drivers/scsi/aacraid/rx.c:450: warning: Function parameter or member 'dev' not described in 'aac_rx_ioremap'

Link: https://lore.kernel.org/r/20200713080001.128044-10-lee.jones@linaro.org
Cc: Adaptec OEM Raid Solutions <aacraid@microsemi.com>
Cc: "PMC-Sierra, Inc" <aacraid@pmc-sierra.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/aacraid/rx.c

@@ -144,7 +144,16 @@ static void aac_rx_enable_interrupt_message(struct aac_dev *dev)
  *	@dev: Adapter
  *	@command: Command to execute
  *	@p1: first parameter
- *	@ret: adapter status
+ *	@p2: second parameter
+ *	@p3: third parameter
+ *	@p4: forth parameter
+ *	@p5: fifth parameter
+ *	@p6: sixth parameter
+ *	@status: adapter status
+ *	@r1: first return value
+ *	@r2: second return value
+ *	@r3: third return value
+ *	@r4: forth return value
  *
  *	This routine will send a synchronous command to the adapter and wait 
  *	for its	completion.
@@ -443,6 +452,7 @@ static int aac_rx_deliver_message(struct fib * fib)
 
 /**
  *	aac_rx_ioremap
+ *	@dev: adapter
  *	@size: mapping resize request
  *
  */