PCI: Revert "PCI: disable MSI by default on systems with Serverworks HT1000 chips"

This reverts commit e3008ded.

The real bug was an INTX issue in the tg3 ethernet chip, and
cured by commit c129d962a66c76964954a98b38586ada82cf9381

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>