[Bug target/64003] valgrind complains about get_attr_length_nobnd in insn-attrtab.c from i386.md

[enkovich.gnu at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64003

--- Comment #26 from Ilya Enkovich <enkovich.gnu at gmail dot com> ---
(In reply to rsandifo@gcc.gnu.org from comment #25)
> 
> If all you want to do is add 1 byte to the length to account for a prefix
> then it might be cleaner to use ADJUST_INSN_LENGTH.  You could then keep
> the single nobnd patterns.

Currently i386 target doesn't have ADJUST_INSN_LENGTH defined.  So I prefer to
keep it so and have all length definitions explicit in md file.