ARM: omap2plus_defconfig: Enable Netfilter components as modules

Enable the majority of the Netfilter components as loadable modules
in the omap2plus_defconfig file.

Signed-off-by: Ivan Jelincic <parazyd@dyne.org>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: parazyd <parazyd@dyne.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>