mpt fusion: RESEND: fix for previous patch taskmgmt in progess should be cleared before return

Resending patch set considering comments for my previous patch set. These patches are created on top of MPT fusion previous patch applied on date 26/02/2009 with subject line: "mpt fusion: config, Taskmgmt cmd, Internal cmd, Ioctl cmd changes"

Some patches are splited into two diffrent patches only for readability purpose for reviewer.

Consider below patches as one logical patch. There is no harm to send those patches as single patch, but to give more readability I have choosen to split.
PATCH 2 and PATCH 3.
PATCH 4 and PATCH 5.

PATCH 3 and PATCH 5 include only those function which are not part of MPT fusion.
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