mmu-hash32: Cleanup BAT lookup This patch makes a general cleanup of the ppc_hash32_get_bat() function, renaming it to ppc_hash32_bat_lookup(). In particular, the new function only looks for a matching BAT, with the permissions check from the old function moved to the caller. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>