warp: Enable CONFIG_SUPPORT_EMMC_BOOT

CONFIG_SUPPORT_EMMC_BOOT is important to enable the boot partition via
'mmc partconf 0 1 1 0' command, for example.

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

include/configs/warp.h

@@ -28,6 +28,7 @@
 #define CONFIG_SYS_FSL_ESDHC_ADDR	USDHC2_BASE_ADDR
 #define CONFIG_SYS_FSL_ESDHC_FORCE_VSELECT
 #define CONFIG_SYS_FSL_ESDHC_HAS_DDR_MODE
+#define CONFIG_SUPPORT_EMMC_BOOT
 
 /* Command definition */
 #undef CONFIG_CMD_NET