drivers: mmc: iproc_sdhci: fix compilation warning

set_ios_post return type changed from void to int, correcting
the same to fix compilation warning.

Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Signed-off-by: Bharat Kumar Reddy Gooty <bharat.gooty@broadcom.com>
diff --git a/drivers/mmc/iproc_sdhci.c b/drivers/mmc/iproc_sdhci.c
index f65a1e5..0f4d608 100644
--- a/drivers/mmc/iproc_sdhci.c
+++ b/drivers/mmc/iproc_sdhci.c
@@ -136,7 +136,7 @@
 }
 #endif
 
-static void sdhci_iproc_set_ios_post(struct sdhci_host *host)
+static int sdhci_iproc_set_ios_post(struct sdhci_host *host)
 {
 	u32 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 
@@ -147,6 +147,8 @@
 		ctrl |= UHS_DDR50_BUS_SPEED;
 
 	sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+
+	return 0;
 }
 
 static struct sdhci_ops sdhci_platform_ops = {