Add a dynamic host_flags argument to make ahci_platform_init_host more flexible,
then remove the AHCI_HFLAGS(...) argument from some driver's ata_port_info,
and pass that in as the new argument.

Cc: Hans de Geode <hdegoede@redhat.com>
Reviewed-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NKefeng Wang <kefeng.wang@linaro.org>
Signed-off-by: NTejun Heo <tj@kernel.org>