redhat/configs: automotive: change VIRTIO_NET from a module to built in

Brian Masneyrequested to merge
bmasney/kernel-ark:virtio-net into os-build

Upstream Status: RHEL Only

Do this to help with the overall boot speed for the qemu target. This also requires changing two other smaller drivers (net/core/failover.c and drivers/net/net_failover.c) to built in.

Here's the kernel module sizes for x86_64:

   text	   data	    bss	    dec	    hex	filename
   5334	   1588	     32	   6954	   1b2a	failover.ko
  14399	   1692	      0	  16091	   3edb	net_failover.ko
  73742	   4755	      4	  78501	  132a5	virtio_net.ko

Signed-off-by: Brian Masney bmasney@redhat.com

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