mx6sabre_common: Add DFU support

Add DFU support.

Tested by flashing SPL and u-boot.img into SPI NOR flash with the
following commands:

=> setenv dfu_alt_info ${dfu_alt_info_spl}

=> run dfuspi

On the host PC:

$ sudo dfu-util -D SPL -a spl

On the target:

CTRL+C
=> setenv dfu_alt_info ${dfu_alt_info_img}

=> run dfuspi

On the host PC:

$ sudo dfu-util -D u-boot.img -a u-boot

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>

include/configs/mx6sabre_common.h

@@ -80,6 +80,10 @@
 	"boot_fdt=try\0" \
 	"ip_dyn=yes\0" \
 	"console=" CONFIG_CONSOLE_DEV "\0" \
+	"dfuspi=dfu 0 sf 0:0:10000000:0\0" \
+	"dfu_alt_info_spl=spl raw 0x400\0" \
+	"dfu_alt_info_img=u-boot raw 0x10000\0" \
+	"dfu_alt_info=spl raw 0x400\0" \
 	"fdt_high=0xffffffff\0"	  \
 	"initrd_high=0xffffffff\0" \
 	"mmcdev=" __stringify(CONFIG_SYS_MMC_ENV_DEV) "\0" \
@@ -244,6 +248,12 @@
 #define CONFIG_ANDROID_BOOT_IMAGE
 #define CONFIG_FASTBOOT_BUF_ADDR   CONFIG_SYS_LOAD_ADDR
 #define CONFIG_FASTBOOT_BUF_SIZE   0x07000000
+
+/* USB Device Firmware Update support */
+#define CONFIG_CMD_DFU
+#define CONFIG_USB_FUNCTION_DFU
+#define CONFIG_DFU_MMC
+#define CONFIG_DFU_SF
 #endif
 
 #endif                         /* __MX6QSABRE_COMMON_CONFIG_H */