[PATCH][PPC32] Artesyn Katana platform update

Hi Andrew.

This patch:

- Adds MTD support for the soldered FLASH
- Adds cmdline parsing
- Turns on the Blue LED when the system is halted
- Moves some of the device window left by the firmware to proper alignments
- Handles possibility of different frequencies for TCLK & SysCLK in 64460
- Misc. code clean up

Please apply.

Signed-off-by: Mark A. Greer <redacted>
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