powerpc/64s: Fix radix MMU when MMU_FTR_HPTE_TABLE is clear

There are a few places that require MMU_FTR_HPTE_TABLE to be set even
when running in radix mode. Fix those up.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211201144153.2456614-15-npiggin@gmail.com