ivi_common: Make some tables only used within the file static
swscale: Mark a bunch of tables only used within one file static
swscale: Move extern declarations for tables to swscale_internal.h

Also add missing ff_ prefixes where necessary.
avcodec: Replace local extern declarations for tables with header #includes
mpeg12decdata: Remove unused #define
mpeg12decdata.h: Move all tables to the only place they are used