configs: Enable EXT4 and ISO partitions for the DeveloperBox

Since this box is SystemReady compliant enable ISO_PARTITION which is
needed to start some installers (e.g Fedora).  While at it enable EXT4
as well which is a common filesystem for targets

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Acked-by: Masami Hiramatsu <masami.hiramatsu@linaro.org>
diff --git a/configs/synquacer_developerbox_defconfig b/configs/synquacer_developerbox_defconfig
index 6deb6f3..1078ad6 100644
--- a/configs/synquacer_developerbox_defconfig
+++ b/configs/synquacer_developerbox_defconfig
@@ -37,6 +37,7 @@
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_CMD_MTDPARTS=y
 CONFIG_CMD_LOG=y
+CONFIG_ISO_PARTITION=y
 CONFIG_PARTITION_TYPE_GUID=y
 CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
@@ -85,6 +86,7 @@
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_XHCI_PCI=y
 CONFIG_USB_STORAGE=y
+CONFIG_FS_EXT4=y
 CONFIG_EFI_SET_TIME=y
 CONFIG_EFI_RUNTIME_UPDATE_CAPSULE=y
 CONFIG_EFI_CAPSULE_ON_DISK=y