mmc: sdhci-brcmstb: constify sdhci_pltfm_data structures

The sdhci_pltfm_data structure is only passed as the second argument
of sdhci_pltfm_init, which is const, so the sdhci_pltfm_data structure
can be const as well.

Done with the help of Coccinelle.
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-brcmstb.c

@@ -63,7 +63,7 @@ static const struct sdhci_ops sdhci_brcmstb_ops = {
 	.set_uhs_signaling = sdhci_set_uhs_signaling,
 };
 
-static struct sdhci_pltfm_data sdhci_brcmstb_pdata = {
+static const struct sdhci_pltfm_data sdhci_brcmstb_pdata = {
 	.ops = &sdhci_brcmstb_ops,
 };