x86_32: summit_32, de-inline functions

The ones which go only into struct genapic are de-inlined
by compiler anyway, so remove the inline specifier from them.

Afterwards, remove summit_setup_portio_remap completely as it
is unused.

Remove inline also from summit_cpu_mask_to_apicid, since it's
not worth it (it is used in struct genapic too).

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>