powerpc/8xx: set PTE bit 22 off TLBmiss

No need to re-set this bit at each TLB miss. Let's set it in the PTE.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <scottwood@freescale.com>

diff --cc arch/powerpc/include/asm/pgtable-ppc32.h
Simple merge

diff --cc arch/powerpc/include/asm/pte-8xx.h
Simple merge

diff --cc arch/powerpc/kernel/head_8xx.S
Simple merge