net/i40e/base: add admin queue definitions for cloud filters

Add new admin queue definitions and extended fields for cloud
filter support. Define big buffer for extended general fields
in Add/Remove Cloud filters command.

Also rename i40e_aqc_add_remove_cloud_filters_element_data to
i40e_aq__cloud_filters_element_data.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Beilei Xing <beilei.xing@intel.com>