A big pile of sym2-related changes.  I have most of them split apart in
CVS, so I can submit them as individual patches if anyone's interested.

Changelog:
 - Use pci_set_mwi() instead of trying to do it ourselves.
 - Rename PCI_ID_LSI53C1010 to 1010_33 and PCI_ID_LSI53C1010_2 to 1010_66.
 - Turn sym_udelay and sym_mdelay into macros.
 - Move the definition of sym53c8xx_lock near the functions that call it
   and remove the macros that wrapper it.
 - SYM_LINUX_DYNAMIC_DMA_MAPPING is always defined.  (Christoph Hellwig)
 - Remove first_host (Christoph Hellwig)
 - Support for hp C3000 (Grant Grundler)
 - Switch to using pci_name()
 - Remove the #if 0'd code from the pci_driver conversion.
 - Remove the sym_chip typedef.
 - Remove the pcifix option.
 - Remove a redundant printk on driver initialisation.
 - Use rmb() for __READ_BARRIER and wmb() for __WRITE_BARRIER
 - Increment the version to 2.1.17a.