scsi: ipr: Fix incorrect function names in their headers

scsi: ipr: Fix incorrect function names in their headers

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

 drivers/scsi/ipr.c:5335: warning: expecting prototype for ipr_eh_dev_reset(). Prototype was for __ipr_eh_dev_reset() instead
 drivers/scsi/ipr.c:5594: warning: expecting prototype for ipr_eh_abort(). Prototype was for ipr_scan_finished() instead
 drivers/scsi/ipr.c:5616: warning: expecting prototype for ipr_eh_host_reset(). Prototype was for ipr_eh_abort() instead
 drivers/scsi/ipr.c:6725: warning: expecting prototype for ipr_info(). Prototype was for ipr_ioa_info() instead

[mkp: tweaked ipr_scan_finished() comment]

Link: https://lore.kernel.org/r/20210317091230.2912389-3-lee.jones@linaro.org
Cc: Brian King <brking@us.ibm.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>