igzip: reformat using new code style

Signed-off-by: Marcel Cornu <marcel.d.cornu@intel.com>

igzip: Implement large hash table method as level 2

Move current level 2 compression to be level 3 and create a level 2
compression which is the same algorithm as level 1 but with a larger
hashtable

igzip: Implement large hash table method as level 2

Move current level 2 compression to be level 3 and create a level 2
compression which is the same algorithm as level 1 but with a larger
hashtable.

Change-Id: I398a6017c2ff218dded24e229fb51c23ea69f314
Signed-off-by: Roy Oursler <roy.j.oursler@intel.com>

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igzip: Separate concept of level and compression method

Change-Id: I82a5fbeb93adc77057893c643e044e311e4f393c
Signed-off-by: Roy Oursler <roy.j.oursler@intel.com>

igzip: Move hash_table and symbol histogram for icf compression

Change-Id: I50df9c8915ff3e1af450aeb8e4c0cc3baf9624ae
Signed-off-by: Roy Oursler <roy.j.oursler@intel.com>

igzip: Implement optimized level 2 compression

Change-Id: I8cf5bcd56f290d17205ac36dc2828c8acfc66947
Signed-off-by: Roy Oursler <roy.j.oursler@intel.com>

igzip: Implement block buffer

Change-Id: I9d7942740557e4ffaf8e223e190f4bd4e4f47b1e
Signed-off-by: Roy Oursler <roy.j.oursler@intel.com>

igzip: Implement type 0 blocks for level 1 compress

Change-Id: If55ab161623d29fa6fb08df3bc813e654918e592

igzip: Change zero length array and typos found in windows build

Change-Id: Ia185b600af3c5f3b34bb9411daae6877f99b05d7
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>

igzip: implement igzip two pass

Change-Id: I9564b2da251a02197b39cab5f141e7aff1ae8439
Signed-off-by: Roy Oursler <roy.j.oursler@intel.com>