mmc: sdhci: convert sdhci_set_clock() into a library function

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Markus Pargmann <mpa@pengutronix.de>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 87f9dd9..b3a28f6 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -1078,6 +1078,7 @@
 }
 
 static const struct sdhci_ops sdhci_pci_ops = {
+	.set_clock	= sdhci_set_clock,
 	.enable_dma	= sdhci_pci_enable_dma,
 	.set_bus_width	= sdhci_pci_set_bus_width,
 	.reset		= sdhci_reset,