memory: make cpu_physical_memory_reset_dirty() take a length parameter
We have an end parameter in all the callers, and this make it coherent
with the rest of cpu_physical_memory_* functions, that also take a
length parameter.
Once here, move the start/end calculation to
tlb_reset_dirty_range_all() as we don't need it here anymore.
Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Orit Wasserman <owasserm@redhat.com>