scsi: qla2xxx: Move FCE Trace buffer allocation to user control

scsi: qla2xxx: Move FCE Trace buffer allocation to user control

commit 841df27d619ee1f5ca6473e15227b39d6136562d upstream.

Currently FCE Tracing is enabled to log additional ELS events. Instead,
user will enable or disable this feature through debugfs.

Modify existing DFS knob to allow user to enable or disable this
feature.

echo [1 | 0] > /sys/kernel/debug/qla2xxx/qla2xxx_??/fce
cat  /sys/kernel/debug/qla2xxx/qla2xxx_??/fce

Cc: stable@vger.kernel.org
Fixes: df613b96077c ("[SCSI] qla2xxx: Add Fibre Channel Event (FCE) tracing support.")
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Link: https://lore.kernel.org/r/20241115130313.46826-4-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>