Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20150512' into staging

target-arm queue:
 * Support TZ and grouping in the GIC
 * hw/sd: sd_reset cleanup
 * armv7m_nvic: fix bug in systick device

# gpg: Signature made Tue May 12 12:02:26 2015 BST using RSA key ID 14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"

* remotes/pmaydell/tags/pull-target-arm-20150512:
  hw/arm/highbank.c: Wire FIQ between CPU <> GIC
  hw/arm/vexpress.c: Wire FIQ between CPU <> GIC
  hw/arm/virt.c: Wire FIQ between CPU <> GIC
  hw/intc/arm_gic: Add grouping support to gic_update()
  hw/intc/arm_gic: Change behavior of IAR writes
  hw/intc/arm_gic: Change behavior of EOIR writes
  hw/intc/arm_gic: Handle grouping for GICC_HPPIR
  hw/intc/arm_gic: Restrict priority view
  hw/intc/arm_gic: Implement Non-secure view of RPR
  hw/intc/arm_gic: Make ICCICR/GICC_CTLR banked
  hw/intc/arm_gic: Make ICCBPR/GICC_BPR banked
  hw/intc/arm_gic: Make ICDDCR/GICD_CTLR banked
  hw/intc/arm_gic_kvm.c: Save and restore GICD_IGROUPRn state
  hw/intc/arm_gic: Add Interrupt Group Registers
  hw/intc/arm_gic: Switch to read/write callbacks with tx attributes
  hw/intc/arm_gic: Add Security Extensions property
  hw/intc/arm_gic: Create outbound FIQ lines
  hw/sd: Don't pass BlockBackend to sd_reset()
  armv7m_nvic: systick: Reload the RELOAD value and count down only if ENABLE bit is set

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>