PCI: Change all drivers to use pci_device->revision

Instead of all drivers reading pci config space to get the revision
ID, they can now use the pci_device->revision member.

This exposes some issues where drivers where reading a word or a dword
for the revision number, and adding useless error-handling around the
read. Some drivers even just read it for no purpose of all.

In devices where the revision ID is being copied over and used in what
appears to be the equivalent of hotpath, I have left the copy code
and the cached copy as not to influence the driver's performance.

Compile tested with make all{yes,mod}config on x86_64 and i386.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/net/dl2k.h

@@ -668,7 +668,6 @@ struct netdev_private {
 	unsigned int rx_flow:1;		/* Rx flow control enable */
 	unsigned int phy_media:1;	/* 1: fiber, 0: copper */
 	unsigned int link_status:1;	/* Current link status */
-	unsigned char pci_rev_id;	/* PCI revision ID */
 	struct netdev_desc *last_tx;	/* Last Tx descriptor used. */
 	unsigned long cur_rx, old_rx;	/* Producer/consumer ring indices */
 	unsigned long cur_tx, old_tx;