- Add support for ram disk offset (.IMG file is a RAW image, partition starts later...)

- Add support for ram disk offset (.IMG file is a RAW image, partition starts later...)
- Fix ram disk support in FreeLDR, ARC changes had broken support for booting FreeLDR (not just the Windows) from a ram disk. ARM port now initializes ramdisk as an FS device.
- Fix hardcoded DISKREADBUFFER and FILESYSBUFFER values. On ARM these will be dynamically selected for each board (need to improve this through LLB).
- Now FreeLDR.ini is read, and crash happens because UI routines are all NULL.

svn path=/trunk/; revision=45405