This change alters the behavior of the "MCP10x Store Gathering
Enable" option.  Previously, selecting this option would enable
store gathering, while not selecting the option would leave the
firmware-provided state. In short, there was no way to disable
store gathering if the firmware had left it enabled. This caused
problems with the Adaptec 2940U2W when run in 8240 and 8245
Sandpoint systems. The new code will disable store gathering unless
the user requests it.