mmc: sdhci: Drop sdhci_free_host()/sdhci_pltfm_free() interface

>From now on, all calls to sdhci_free_host()/sdhci_pltfm_free() have been
cleaned up, so we can just delete them.

Signed-off-by: Binbin Zhou <[e-mail]>
Link: https://lore.kernel.org/r/8a[e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/sdhci-pltfm.c

···
 }
 EXPORT_SYMBOL_GPL(sdhci_pltfm_init);
 
-void sdhci_pltfm_free(struct platform_device *pdev)
-{
-}
-EXPORT_SYMBOL_GPL(sdhci_pltfm_free);
-
 int sdhci_pltfm_init_and_add_host(struct platform_device *pdev,
 				  const struct sdhci_pltfm_data *pdata,
 				  size_t priv_size)

drivers/mmc/host/sdhci-pltfm.h

···
 extern struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
 					  const struct sdhci_pltfm_data *pdata,
 					  size_t priv_size);
-extern void sdhci_pltfm_free(struct platform_device *pdev);
 
 extern int sdhci_pltfm_init_and_add_host(struct platform_device *pdev,
 					 const struct sdhci_pltfm_data *pdata,

drivers/mmc/host/sdhci.c

···
 
 EXPORT_SYMBOL_GPL(sdhci_remove_host);
 
-void sdhci_free_host(struct sdhci_host *host)
-{
-}
-
-EXPORT_SYMBOL_GPL(sdhci_free_host);
-
 /*****************************************************************************\
  *                                                                           *
  * Driver init/exit                                                          *

drivers/mmc/host/sdhci.h

···
 #endif /* CONFIG_MMC_SDHCI_IO_ACCESSORS */
 
 struct sdhci_host *sdhci_alloc_host(struct device *dev, size_t priv_size);
-void sdhci_free_host(struct sdhci_host *host);
 
 static inline void *sdhci_priv(struct sdhci_host *host)
 {