mmc: sdhci-pci: Let devices define how to add the host

SDHCI provides more flexibility than simply calling sdhci_add_host(). Make
that available by allowing devices to specify their own ->add_host()
function.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>

drivers/mmc/host/sdhci-pci-core.c

@@ -1949,6 +1949,9 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
 		}
 	}
 
+	if (chip->fixes && chip->fixes->add_host)
+		ret = chip->fixes->add_host(slot);
+	else
 		ret = sdhci_add_host(host);
 	if (ret)
 		goto remove;

drivers/mmc/host/sdhci-pci.h

@@ -64,6 +64,7 @@ struct sdhci_pci_fixes {
 	int			(*probe) (struct sdhci_pci_chip *);
 
 	int			(*probe_slot) (struct sdhci_pci_slot *);
+	int			(*add_host) (struct sdhci_pci_slot *);
 	void			(*remove_slot) (struct sdhci_pci_slot *, int);
 
 	int			(*suspend) (struct sdhci_pci_chip *);