mfd: Add missing WM5102 ifdefs

References to the WM5102 tables need to be guarded.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/arizona-i2c.c b/drivers/mfd/arizona-i2c.c
index 75fb110..fe19d11 100644
--- a/drivers/mfd/arizona-i2c.c
+++ b/drivers/mfd/arizona-i2c.c
@@ -30,9 +30,11 @@
 	int ret;
 
 	switch (id->driver_data) {
+#ifdef CONFIG_MFD_WM5102
 	case WM5102:
 		regmap_config = &wm5102_i2c_regmap;
 		break;
+#endif
 	default:
 		dev_err(&i2c->dev, "Unknown device type %ld\n",
 			id->driver_data);