mfd: Add devices for WM831x clocking module

With the new generic clk API that should appear at some point we should be
able to support the clocking sensibly in Linux.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/wm831x-core.c

@@ -731,6 +731,9 @@ static struct mfd_cell wm8310_devs[] = {
 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
 		.resources = wm831x_dcdc4_resources,
 	},
+	{
+		.name = "wm831x-clk",
+	},
 	{
 		.name = "wm831x-epe",
 		.id = 1,
@@ -882,6 +885,9 @@ static struct mfd_cell wm8311_devs[] = {
 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
 		.resources = wm831x_dcdc4_resources,
 	},
+	{
+		.name = "wm831x-clk",
+	},
 	{
 		.name = "wm831x-epe",
 		.id = 1,
@@ -1009,6 +1015,9 @@ static struct mfd_cell wm8312_devs[] = {
 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
 		.resources = wm831x_dcdc4_resources,
 	},
+	{
+		.name = "wm831x-clk",
+	},
 	{
 		.name = "wm831x-epe",
 		.id = 1,
@@ -1160,6 +1169,9 @@ static struct mfd_cell wm8320_devs[] = {
 		.num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
 		.resources = wm8320_dcdc4_buck_resources,
 	},
+	{
+		.name = "wm831x-clk",
+	},
 	{
 		.name = "wm831x-gpio",
 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),