Add ISL91301 to defconfig

Change-Id: I0b243b4e805a0d38c32883bae065062d3b476134
diff --git a/defconfig b/defconfig
index 05b4a8f..52e91ef 100644
--- a/defconfig
+++ b/defconfig
@@ -26,3 +26,4 @@
 CONFIG_REGULATOR_BD71837=y
 CONFIG_MXC_CAMERA_OV5645_MIPI_V2=y
 CONFIG_SPI_IMX=y
+CONFIG_REGULATOR_ISL91301=y