mmc: sdhci: add const qualifier to the name of struct sdhci_host

This allows to drop annoying (char *) casts when setting the host
name of struct sdhci_host.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/drivers/mmc/pci_mmc.c b/drivers/mmc/pci_mmc.c
index 5fb7151..340eef6 100644
--- a/drivers/mmc/pci_mmc.c
+++ b/drivers/mmc/pci_mmc.c
@@ -28,7 +28,7 @@
 		if (!mmc_host)
 			return -ENOMEM;
 
-		mmc_host->name = (char *)name;
+		mmc_host->name = name;
 		dm_pci_read_config32(dev, PCI_BASE_ADDRESS_0, &iobase);
 		mmc_host->ioaddr = (void *)iobase;
 		mmc_host->quirks = 0;