Update defconfig to use superset bd71840 driver

Change-Id: Id36aff8b525d4e8b04a77e58343f992833f61f18
diff --git a/defconfig b/defconfig
index 60c3e68..cae1e86 100644
--- a/defconfig
+++ b/defconfig
@@ -8,8 +8,6 @@
 CONFIG_BUILD_ARM_APPENDED_DTB_IMAGE=n
 CONFIG_KERNEL_GZIP=y
 CONFIG_KERNEL_LZO=n
-CONFIG_REGULATOR_BD71837=y
-CONFIG_MFD_BD71837=y
 CONFIG_LOG_BUF_SHIFT=17
 CONFIG_WLAN=y
 CONFIG_ATH10K=n
@@ -49,8 +47,8 @@
 CONFIG_SND_SOC_RT5645=y
 CONFIG_SND_SOC_RT5631=y
 CONFIG_SND_SOC_RL6231=y
-CONFIG_MFD_BD71837=y
-CONFIG_REGULATOR_BD71837=y
+CONFIG_MFD_BD71840=y
+CONFIG_REGULATOR_BD71840=y
 CONFIG_MXC_CAMERA_OV5645_MIPI_V2=y
 CONFIG_SPI_IMX=y
 # CONFIG_REGULATOR_ISL91301 is not set