Revert "mmc: sdhci-pci: add quirks for broken MSI on O2Micro controllers"

This reverts commit c16e981b2fd9455af670a69a84f4c8cf07e12658, because
it's no longer useful once MSI support is reverted.
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/sdhci-pci.c

@@ -561,7 +561,6 @@ static int jmicron_resume(struct sdhci_pci_chip *chip)
 
 static const struct sdhci_pci_fixes sdhci_o2 = {
 	.probe		= o2_probe,
-	.quirks2	= SDHCI_QUIRK2_BROKEN_MSI,
 };
 
 static const struct sdhci_pci_fixes sdhci_jmicron = {
@@ -1419,7 +1418,6 @@ static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
 
 	slots = chip->num_slots;	/* Quirk may have changed this */
 
-	if (!(chip->quirks2 & SDHCI_QUIRK2_BROKEN_MSI))
 	pci_enable_msi(pdev);
 
 	for (i = 0; i < slots; i++) {

include/linux/mmc/sdhci.h

@@ -91,8 +91,6 @@ struct sdhci_host {
 	unsigned int quirks2;	/* More deviations from spec. */
 
 #define SDHCI_QUIRK2_HOST_OFF_CARD_ON			(1<<0)
-/* broken MSI Interrupts */
-#define SDHCI_QUIRK2_BROKEN_MSI				(1<<1)
 
 	int irq;		/* Device IRQ */
 	void __iomem *ioaddr;	/* Mapped address */