Don't print out a failure message when an attach for FFixedHW fails. Instead, just fail to attach so another hardware-specific driver can claim the device.  Also, clean up some small memory leaks in the failure case.
Don't print out a failure message when an attach for FFixedHW fails.
Instead, just fail to attach so another hardware-specific driver can
claim the device.  Also, clean up some small memory leaks in the failure
case.

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