ARM: use high vectors if possible

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Created this series to get high vector support. Using high vectors
at 0xffff0000 allow us to map in a faulting page at 0x0 with which
we can catch NULL pointer dereferences. The other patches are only
some cleanups around exceptions which I came along the way.

Sascha

Sascha Hauer (8):
      ARM: add missing volatile in get_cr()
      ARM mmu: fix arm_create_pte
      ARM mmu: use high vectors if possible
      ARM: remove unused exception
      ARM: exceptions: remove unnecessary function declarations
      ARM: remove unused irq enable/disable functions
      ARM: fix comments in interrupts.c
      ARM: some cleanup in interrupts.c

 arch/arm/cpu/exceptions.S     |    5 --
 arch/arm/cpu/interrupts.c     |  105 ++++++++++-------------------------------
 arch/arm/cpu/mmu.c            |   39 ++++++++++++---
 arch/arm/cpu/start.c          |    2 +-
 arch/arm/include/asm/system.h |    2 +-
 5 files changed, 60 insertions(+), 93 deletions(-)

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