Add Microblaze configuration options

Firstly this patch series tidies up some code and removes a "xlnx." prefix.

Then it moves the Microblaze PVR registers to the end of the CPUMBState to preserve them during reset. This allows most of the operations on them to be moved from the reset to the realise. Except for the machine specific ones which will be moved when the other properties are converted across to standard QEMU props, after this patch series is accepted (either merged or the method I'm using is approved). See the individual commit for more details.

Next it adds the "use-stack-protection" property to the Microblaze CPU, which allows stack protection to be disabled.

It also converts the previously hardcoded method of enabling the FPU to use standard QEMU properties. This simplifies the logic in the target-microblaze translate.c.

V3:
- Split disabling stack protection into a seperate patch
- Add comments detailing the use-fpu values
V2:
- Small fixes
- Disable stack protection by default
- Remove the memset and cpu_reset functions from the MB realise
Changes since RFC:
- Preserve the PVR registers during resets
- Move most of the logic into realise functions
- Small name and function changes

Alistair Francis (6):
target-microblaze: Fix up indentation
target-microblaze: Preserve the pvr registers during reset
target-microblaze: Allow the stack protection to be disabled
target-microblaze: Tidy up the base-vectors property
target-microblaze: Convert use-fpu to a CPU property
target-microblaze: Disable stack protection by default

 hw/microblaze/petalogix_ml605_mmu.c |    7 +++-
 target-microblaze/cpu-qom.h         |    9 +++++-
 target-microblaze/cpu.c             |   60 ++++++++++++++++++++++-------------
 target-microblaze/cpu.h             |   11 ++++--
 target-microblaze/helper.c          |    8 ++--
 target-microblaze/op_helper.c       |   10 +++---
 target-microblaze/translate.c       |   14 +++-----
 7 files changed, 72 insertions(+), 47 deletions(-)