arm: imx6: novena: Enable extfs support in SPL

Simple patch to enable support for extfs filesystem in SPL,
this is useful to those who want to avoid vfat like plague.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>

include/configs/novena.h

@@ -82,6 +82,7 @@
 
 /* SPL */
 #define CONFIG_SPL_FAT_SUPPORT
+#define CONFIG_SPL_EXT_SUPPORT
 #define CONFIG_SPL_MMC_SUPPORT
 #include "imx6_spl.h"			/* common IMX6 SPL configuration */