target/ppc: Split off real mode handling from get_physical_address_wtlb()

Add ppc_real_mode_xlate() to handle real mode translation and allow
removing this case from ppc_jumbo_xlate().

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
1 file changed