[POWERPC] PS3: Split device setup for static vs. dynamic devices

Split the device setup code in ps3_register_repository_device() in two
routines:
  1. ps3_setup_static_device(), to handle the setup of static devices in the
     PS3 repository, which can be __init,
  2. ps3_setup_dynamic_device(), to handle the setup of storage devices that
     may appear later in the PS3 repository.

This fixes a few section mismatch warnings.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>