Convert modules to kernel builtins.

From menuconfig, convert ipv6 suport, netcfg, bonding interface
from m to *. Most resulted changes are =m to =y, but there are
minor entries removed by menuconfig automatically.

Further removal of unused modules will be done seperately.

bug=22379527

Change-Id: I3c3f69c1478fe05bde5558dfcea7793746828d30
1 file changed