net/ice/base: init IMEM table for parser

net/ice/base: init IMEM table for parser

Parse DDP section ICE_SID_RXPARSER_IMEM into an array of
struct ice_imem_item.

The Instruction Memory (IMEM) section contains three VLIW instructions
for the ALUs, a key extraction instruction for the Parse Graph CAM, and
several other fields.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Junfeng Guo <junfeng.guo@intel.com>