mpt2sas : Description patch

MPT2SAS driver updates.
Please consider it for next Merge window.
patch is taken using 2.6.33-rc7.

[PATCH 01/03] mpt2sas: RESCAN Barrier work is added in case of HBA reset. [PATCH 02/03] mpt2sas: modified _scsih_sas_device_find_by_handle/sas_address [PATCH 03/03] mpt2sas: Upgrading version to 04.100.01.02

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