Add CONFIG_SPI_IMX to defconfig, enable spidev

- CONFIG_SPI_IMX is the driver for SPI master (ecspi). Also turn on the
spidev module to access from userspace.

Change-Id: Id1dd932c4c583960b71234b86e8a20be35dda7b1
diff --git a/defconfig b/defconfig
index 73215a0..05b4a8f 100644
--- a/defconfig
+++ b/defconfig
@@ -25,4 +25,4 @@
 CONFIG_MFD_BD71837=y
 CONFIG_REGULATOR_BD71837=y
 CONFIG_MXC_CAMERA_OV5645_MIPI_V2=y
-
+CONFIG_SPI_IMX=y
diff --git a/rootfs.mk b/rootfs.mk
index e1e0475..1744caa 100644
--- a/rootfs.mk
+++ b/rootfs.mk
@@ -51,6 +51,7 @@
 	echo "enterprise" | sudo tee $(ROOTFS_DIR)/etc/hostname
 	echo "127.0.0.1 enterprise" | sudo tee -a $(ROOTFS_DIR)/etc/hosts
 	echo "en_US.UTF-8 UTF-8" | sudo tee -a $(ROOTFS_DIR)/etc/locale.gen
+	echo "spidev" | sudo tee -a $(ROOTFS_DIR)/etc/modules
 	sudo chroot $(ROOTFS_DIR) locale-gen
 	sudo chroot $(ROOTFS_DIR) mkdir -p /home/enterprise
 	sudo chroot $(ROOTFS_DIR) adduser enterprise --home /home/enterprise --shell /bin/bash --disabled-password --gecos ""