"ip protocol" is missing ospf as an option

"ip protocol" is missing ospf as an option

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Reviewed-by:   Donald Sharp <sharpd@cumulusnetworks.com>
Ticket: CM-10849

We were incorrectly listing protocols that supported ipv6 for "ip
protocol" instead of listing the protocols that supported ipv4.

With the fix

superm-redxp-05(config)# ip protocol ?
  any        Any of the above protocols
  bgp        Border Gateway Protocol (BGP)
  connected  Connected routes (directly attached subnet or host)
  isis       Intermediate System to Intermediate System (IS-IS)
  kernel     Kernel routes (not installed via the zebra RIB)
  ospf       Open Shortest Path First (OSPFv2)
  rip        Routing Information Protocol (RIP)
  static     Statically configured routes
  table      Non-main Kernel Routing Table
superm-redxp-05(config)#
superm-redxp-05(config)#
superm-redxp-05(config)# ipv6 protocol ?
  any        Any of the above protocols
  bgp        Border Gateway Protocol (BGP)
  connected  Connected routes (directly attached subnet or host)
  isis       Intermediate System to Intermediate System (IS-IS)
  kernel     Kernel routes (not installed via the zebra RIB)
  ospf6      Open Shortest Path First (IPv6) (OSPFv3)
  ripng      Routing Information Protocol next-generation (IPv6) (RIPng)
  static     Statically configured routes
  table      Non-main Kernel Routing Table
superm-redxp-05(config)#
superm-redxp-05(config)#