[PATCH 00/13 v2] powerpc: Low level spring cleaning

[Benjamin Herrenschmidt]

This series goes through various bits and pieces of our exception
and interrupts handling, fixin bugs, cleaning up code, adding
missing functionality, etc... The last patch of the series is
a reworked variant of my lazy irq rework.

This needs a good review as it touches pretty nasty bits of code
and more testing obviously.

v2. - Fix build with some config options combos (including all 32-bit)
    - Better handle preempt
    - Fix problems with BookE and FP exceptions (in part introduced by
      a previous version of these, and in part already present)