[PATCH] ppc64: various XICS fixes

[PATCH] ppc64: various XICS fixes

- Remove unused includes.
- Be consistent about printing irq numbers, avoid a mix of decimal and
  hexadecimal.
- Remove prototypes from xics.c, they should be in xics.h.
- Remove infinite loop on failure, and instead use panic. Panic has a chance to
  log the error message on the LED panel and reboot the box, a while(1) loop
  does not.
- xics isnt compiled for iseries any more, so no need for the
  CONFIG_PPC_PSERIES hack.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>