mfd: fix tmio related warnings

We can not have .driver_data as const since platform_set_drvdata() doesnt take
a const.
The hclk mmc_data field can be const though.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/t7l66xb.c b/drivers/mfd/t7l66xb.c
index 875f7a8..0a255c1 100644
--- a/drivers/mfd/t7l66xb.c
+++ b/drivers/mfd/t7l66xb.c
@@ -108,7 +108,7 @@
 
 /*--------------------------------------------------------------------------*/
 
-static const struct tmio_mmc_data t7166xb_mmc_data = {
+static struct tmio_mmc_data t7166xb_mmc_data = {
 	.hclk = 24000000,
 };
 
diff --git a/drivers/mfd/tc6387xb.c b/drivers/mfd/tc6387xb.c
index c3993ac..3280ab33 100644
--- a/drivers/mfd/tc6387xb.c
+++ b/drivers/mfd/tc6387xb.c
@@ -75,7 +75,7 @@
 
 /*--------------------------------------------------------------------------*/
 
-const static struct tmio_mmc_data tc6387xb_mmc_data = {
+static struct tmio_mmc_data tc6387xb_mmc_data = {
 	.hclk = 24000000,
 };
 
diff --git a/drivers/mfd/tc6393xb.c b/drivers/mfd/tc6393xb.c
index 9d2abb5..1429a73 100644
--- a/drivers/mfd/tc6393xb.c
+++ b/drivers/mfd/tc6393xb.c
@@ -136,7 +136,7 @@
 	return 0;
 }
 
-const static struct tmio_mmc_data tc6393xb_mmc_data = {
+static struct tmio_mmc_data tc6393xb_mmc_data = {
 	.hclk = 24000000,
 };
 
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index c377118..6b9c5d0 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -22,7 +22,7 @@
  * data for the MMC controller
  */
 struct tmio_mmc_data {
-	unsigned int		hclk;
+	const unsigned int		hclk;
 };
 
 /*