config: odroid-xu3: remove unused configs

Removing configurations which I am not interested in:
- CONFIG_NETFILTER
- CONFIG_IPV6
- CONFIG_BRIDGE
- CONFIG_CRYPTO_ANSI_CPRNG
- CONFIG_BTRFS_FS
- CONFIG_EXT2/3_FS
- CONFIG_ECRYPT_FS
- CONFIG_CRAMFS
- CONFIG_ROMFS_FS

Add new configuration for my development environment:
- CONFIG_CIFS

Signed-off-by: Heesub Shin <heesub.shin@samsung.com>