dpdk-config: Remove the config patch file, and rewrite the config file
    post `make config'
    
    The config file patch is a bit cumbersome to maintain. Any time the
    config files change, it will be required to regenerate this patch
    against the new sets of files. Additionally, it is difficult to build
    modular enable/disables for these configs down the line.
    
    With this set, create a block for PMD enable/disable. RHEL wants this
    enabled, for sure.
    
    Signed-off-by: Aaron Conole <aconole@redhat.com>
    Acked-by: Neil Horman <nhorman@redhat.com>
    Acked-by: Panu Matilainen <pmatilai@redhat.com>