SCSI gdth: don't call pci_free_consistent under spinlock

SCSI gdth: don't call pci_free_consistent under spinlock

commit: ff83efacf2b77a1fe8942db6613825a4b80ee5e2

The spinlock is held over too large a region: pscratch is a permanent
address (it's allocated at boot time and never changes).  All you need
the smp lock for is mediating the scratch in use flag, so fix this by
moving the spinlock into the case where we set the pscratch_busy flag
to false.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>