Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Drop non-informative _bfin suffix, rename some files for consistency with
other architectures, rename others to reflect their content.

This saves some space in configurations that do not enable hpeldsp.

The functions it contains are used from unconditionally compiled code.

This is done similarly for all other architectures.

Also add a few #endif comments.

They were marked as broken and disabled in 2009 and will never get fixed.

They were marked as broken and disabled in 2009 and will never get fixed.

Also switch from "tbl" to "tab" name suffixes.

This helps grepping for functions, among other things.

The function is supposed to confirm that the compiler provided enough
alignment, but in practice it is only run in certain code paths and
insufficient alignment problems are restricted to legacy compilers.