fpu: rename softfloat-specialize.h -> .inc.c
This is not a normal header and should only be included in the main
softfloat.c file to bring in the various target specific
specialisations. Indeed as it contains non-inlined C functions it is
not even a legal header. Rename it to match our included C convention.
Signed-off-by: Alex Bennée <email@example.com>
Reviewed-by: Richard Henderson <firstname.lastname@example.org>
Reviewed-by: Philippe Mathieu-Daudé <email@example.com>