[SCSI] megaraid_sas: Free event detail memory without device ID check

Free event detail memory from more common place, instead of doing it for
limited device types.

Signed-off-by: Sumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>