Add usb gadget support kernel modules.

Change-Id: I8f84f5a6a44f2653bc69d67a34747bd83ffcd017
diff --git a/defconfig b/defconfig
index 394cf89..ae97bcc 100644
--- a/defconfig
+++ b/defconfig
@@ -60,3 +60,16 @@
 CONFIG_DRM_PANEL_TIANMA_S6D6FP0A2=y
 CONFIG_STAGING_GASKET_FRAMEWORK=y
 CONFIG_STAGING_APEX_DRIVER=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGETFS=y
+CONFIG_USB_FUNCTIONFS=y
+CONFIG_USB_FUNCTIONFS_GENERIC=y
+CONFIG_USB_LIBCOMPOSITE=y
+CONFIG_CONFIGFS_FS=y
+CONFIG_CONFIGFS_F_FS=y
+CONFIG_CONFIGFS_F_MTP=y
+CONFIG_CONFIGFS_F_PTP=y
+CONFIG_CONFIGFS_F_UEVENT=y
+CONFIG_USB_F_FS=y
+CONFIG_USB_F_ACM=y
+CONFIG_USB_GADGETFS=y