[patch] PS3: Fix hardware watchpoints

[Paul Mackerras]

Geoff Levand writes:

> Add PS3 support for the PowerPC processor's Data Address Breakpoint
> Register (DABR).
> 
> Signed-off-by: Arnd Bergmann <arnd.bergmann at de.ibm.com>
> Signed-off-by: Geoff Levand <geoffrey.levand at am.sony.com>
> 
> ---
> Paul, please consider for 2.6.21.

It's nice and small, but it isn't really a bugfix as far as I can
see...  What's the downside of it not going into 2.6.21, apart from
some inconvenience in debugging things?

Paul.