comlayer.c enclosed within #ifdef CONFIG_KRGRPC

Signed-off-by: Lokesh Mandvekar <lsm5@buffalo.edu>
krgrpc commented in _kernel/net/Makefile

Signed-off-by: Lokesh Mandvekar <lsm5@buffalo.edu>
kerrighed_init commented in init/main.c because kerrighed is disabled

Signed-off-by: Lokesh Mandvekar <lsm5@buffalo.edu>