Support levels 5.0 and 5.1 in the encoder properly

The function ih264e_get_lvl_idx lacked handling of them
before, which meant that it returned index 0 (corresponding
to level 1.0) if level 5.0 or 5.1 were selected.

Change-Id: I482213e68e11fd091c72ec57a593392aa1a0a4ae
1 file changed