powerpc/mm/thp: Use tlbiel if possible

If we know that user address space has never executed on other cpus
we could use tlbiel.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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

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

diff --cc arch/powerpc/mm/hash_native_64.c
Simple merge

diff --cc arch/powerpc/mm/hash_utils_64.c
Simple merge

diff --cc arch/powerpc/mm/hugepage-hash64.c
Simple merge

diff --cc arch/powerpc/mm/pgtable_64.c
Simple merge

diff --cc arch/powerpc/platforms/pseries/lpar.c
Simple merge