spl: Add EXT support to SPL

Add EXT filesystem support to SPL.

Signed-off-by: Guillaume GARDET <guillaume.gardet@free.fr>
[trini: Fix a warning and checkpatch problems]
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/common/spl/Makefile b/common/spl/Makefile
index 64569c2..10a4589 100644
--- a/common/spl/Makefile
+++ b/common/spl/Makefile
@@ -18,5 +18,6 @@
 obj-$(CONFIG_SPL_MMC_SUPPORT) += spl_mmc.o
 obj-$(CONFIG_SPL_USB_SUPPORT) += spl_usb.o
 obj-$(CONFIG_SPL_FAT_SUPPORT) += spl_fat.o
+obj-$(CONFIG_SPL_EXT_SUPPORT) += spl_ext.o
 obj-$(CONFIG_SPL_SATA_SUPPORT) += spl_sata.o
 endif