configs: ns3: enable EXT4 and FAT fs support

Enable EXT4 and FAT fs support for ns3.

Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/bcm_ns3_defconfig b/configs/bcm_ns3_defconfig
index 0f23f30..66fbdb2 100644
--- a/configs/bcm_ns3_defconfig
+++ b/configs/bcm_ns3_defconfig
@@ -20,6 +20,10 @@
 CONFIG_CMD_MMC_SWRITE=y
 # CONFIG_CMD_PINMUX is not set
 # CONFIG_CMD_SOURCE is not set
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+# CONFIG_DOS_PARTITION is not set
 CONFIG_OF_CONTROL=y
 CONFIG_DEFAULT_DEVICE_TREE="ns3-board"
 CONFIG_DM=y
@@ -33,4 +37,5 @@
 CONFIG_PINCTRL_SINGLE=y
 CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y
+CONFIG_FAT_WRITE=y
 CONFIG_SPL_OF_LIBFDT=y