Reduced memory requirements.

Buffer allocation is based on minimum level required for the
input resolution rather than the input max level.

Number of maximum context sets can be set to 1 to reduce
memory usage.

Added a macro ENC_MIN_PU_SIZE for minimum size of
inter prediction unit supported by encoder.

Changed the maximum constraint on number of MBs for NMB
processing to width in Mbs.

Change-Id: I5a9255e93935d90c13262681aafc772aedf8ae81
8 files changed