If an abort times out, the Abort IOCB completion and Abort timer can race
against each other. This patch provides unique error code for timer path to
allow proper cleanup.

[mkp: typo]
Signed-off-by: NQuinn Tran <qutran@marvell.com>
Signed-off-by: NHimanshu Madhani <hmadhani@marvell.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>