ipodpatcher: move sectorbuf pointer into ipod_t structure.

The ipod_t structure holds all relevant information for ipodpatcher. Put the
global ipod_sectorbuf pointer into it as well. Allows the Rockbox Utility Ipod
class to be instanciated multiple times since each instance can now have its
own buffer.

Change-Id: Ie319cbadbc20c367ceadba9a46b4dc34b57a79a7
9 files changed