pismo upgraded to 750fx not detected correctly

[Benjamin Herrenschmidt]

> > ***************
> > *** 127,132 ****
> > --- 148,158 ----
> >   	slwi	r4,r4,2
> >   	sub	r8,r8,r3
> >   	stwx	r8,r4,r6
> > +
> > + 	addis	r6,r3,real_pvr at ha
> > + 	addi	r6,r6,real_pvr at l
> > + 	stwx	r7,0,r6
>
> A bit convoluted no? r3 is supposed to be zero, so
> the standard way of performing this is:

Well... he may be called while the kernel hasn't been relocated
yet, so he should take r3 into account at this point.


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