socfpga: chameleonv3: Enable ext4 in SPL

Allow SPL to boot from an ext4 filesystem.

Signed-off-by: Paweł Anikiel <pan@semihalf.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/socfpga_chameleonv3_defconfig b/configs/socfpga_chameleonv3_defconfig
index 4bbce35..5d08fd2 100644
--- a/configs/socfpga_chameleonv3_defconfig
+++ b/configs/socfpga_chameleonv3_defconfig
@@ -7,6 +7,7 @@
 CONFIG_SPL_TEXT_BASE=0xFFE00000
 CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_TARGET_SOCFPGA_CHAMELEONV3=y
+CONFIG_SPL_FS_EXT4=y
 CONFIG_SPL_FS_FAT=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y