[patch,libstdc++] Fix (again) m68k/atomicity.h

[Benjamin Kosnik]

>2003-10-16  Bernardo Innocenti  <bernie@develer.com>
>
>	* config/cpu/m68k/atomicity.h (__exchange_and_add): Use TAS on
>	__mcf5400__. Don't rely on __mc68000__ to detect a bare 68000.
>	Document SMP safeness of asm macros.

OK

> Bootstrapped on m68k-uclinux with multilib enabled
> (m5200, m5206e, m528x, m5307,  m5407, m68000, mcpu32).

Do you have test results for this? Curious,

-benjamin