net/ixgbe: eliminate duplicate filterlist symbols

net/ixgbe: eliminate duplicate filterlist symbols

Some compilers generate warnings for duplicate symbols for the
set of filter lists current defined in ixgbe_ethdev.h.

This commits moves the definition and declaration to the source
file that actually uses them and provides a function to
initialize the values akin to its flush function.

Signed-off-by: David Harton <dharton@cisco.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
Reviewed-by: Radu Nicolau <radu.nicolau@intel.com>