scsi: Move pccb buffer initalization directly to scsi_detect_dev

pccb is pointer to temporary buffer which is used only for sending
command. Make it local as is done in scsi_read/scsi_write.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed