defconfig: fsm9900: Enable Netfilter options

Various netfilter options are enabled to allow for DSCP marking and
classifying/filtering traffic based on various info in the IP packets.

Change-Id: I2445ec1461402951532d64f02ab91383b1b4acde
Acked-by: Perry Wintner <pwintner@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>