Revert "Update defconfig to use superset bd71840 driver"

This reverts commit 3b4a2be0ff82a1abbe6014571fdc304cd94c0c83.

Reason for revert: Breaks GPU

Change-Id: I5218dbb463ec55fb0a5a63f5436b5ec9fd42ea2c
diff --git a/defconfig b/defconfig
index cae1e86..60c3e68 100644
--- a/defconfig
+++ b/defconfig
@@ -8,6 +8,8 @@
 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
@@ -47,8 +49,8 @@
 CONFIG_SND_SOC_RT5645=y
 CONFIG_SND_SOC_RT5631=y
 CONFIG_SND_SOC_RL6231=y
-CONFIG_MFD_BD71840=y
-CONFIG_REGULATOR_BD71840=y
+CONFIG_MFD_BD71837=y
+CONFIG_REGULATOR_BD71837=y
 CONFIG_MXC_CAMERA_OV5645_MIPI_V2=y
 CONFIG_SPI_IMX=y
 # CONFIG_REGULATOR_ISL91301 is not set