Merge branch 'upstream-merge'

Merge branch 'upstream-merge'

* upstream-merge: (159 commits)
  xilinx_zynq: machine model initial version
  cadence_gem: initial version of device model
  cadence_ttc: initial version of device model
  cadence_uart: initial version of device model
  microblaze_boot: enabled -dtb argument
  qemu-options.hx: allow -dtb argument for all archs
  petalogix_s2adsp1800: macro'd magic numbers
  petalogix_s2adsp1800: moved rst logic to rst fn
  microblaze: factored out common boot code
  Move helpers.h to helper.h
  s390: Rework kernel loading: supports elf and newer kernels
  memory: fix I/O port aliases
  ioport: add destructor method to IORange
  w64: fix type casts when calling flush_icache_range
  cache-utils: Change data type of parameters for flush_icache_range
  w64: Change data type of parameters for flush_icache_range
  w64: Fix data type of parameters for flush_icache_range
  tcg: Rearrange definitions and include statements
  w64: Fix size of ram_addr_t
  usb: Fix signature of stub usb_host_device_open
  ...

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>