mmc: sdhci-iproc: fix oops in sdhci_iproc_writew

The driver co-allocates sdhci_iproc_host with sdhci_pltfm_host and so to
access it we need to use sdhci_pltfm_priv() and not pltfm_host->priv.
Signed-off-by: NDmitry Torokhov <dtor@chromium.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-iproc.c

@@ -97,7 +97,7 @@ static inline void sdhci_iproc_writel(struct sdhci_host *host, u32 val, int reg)
 static void sdhci_iproc_writew(struct sdhci_host *host, u16 val, int reg)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
-	struct sdhci_iproc_host *iproc_host = pltfm_host->priv;
+	struct sdhci_iproc_host *iproc_host = sdhci_pltfm_priv(pltfm_host);
 	u32 word_shift = REG_OFFSET_IN_BITS(reg);
 	u32 mask = 0xffff << word_shift;
 	u32 oldval, newval;