V4L/DVB (8912): cx18: Correct CX23418 PCI configuration settings.

cx18: Correct CX23418 PCI configuration settings.  The CX23418 doesn't have
I/O space registers, so there was no need to try and turn them on (the card
ignores the attempt to set the bit anyway).  Also removed incorrect config
space register setting that was errantly borrowed from ivtv.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx18/cx18-driver.c

@@ -511,9 +511,9 @@ static int cx18_setup_pci(struct cx18 *cx, struct pci_dev *dev,
 		return -EIO;
 	}
 
-	/* Check for bus mastering */
+	/* Enable bus mastering and memory mapped IO for the CX23418 */
 	pci_read_config_word(dev, PCI_COMMAND, &cmd);
-	cmd |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
+	cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
 	pci_write_config_word(dev, PCI_COMMAND, cmd);
 
 	pci_read_config_byte(dev, PCI_CLASS_REVISION, &cx->card_rev);
@@ -525,11 +525,6 @@ static int cx18_setup_pci(struct cx18 *cx, struct pci_dev *dev,
 		pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
 		pci_read_config_byte(dev, PCI_LATENCY_TIMER, &pci_latency);
 	}
-	/* This config space value relates to DMA latencies. The
-	   default value 0x8080 is too low however and will lead
-	   to DMA errors. 0xffff is the max value which solves
-	   these problems. */
-	pci_write_config_dword(dev, 0x40, 0xffff);
 
 	CX18_DEBUG_INFO("cx%d (rev %d) at %02x:%02x.%x, "
 		   "irq: %d, latency: %d, memory: 0x%lx\n",