pc: Remove PCLMULQDQ from Westmere on pc-*-1.4 and older

Commit 41cb383f42d0cb51d8e3e25e3ecebc954dd4196f made a guest-visible
change by adding the PCLMULQDQ bit to Westmere without adding
compatibility code to keep the ABI for older machine-types.
Fix it by adding the missing compat code.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
hw/misc: don't create pvpanic device by default

This patch is based on Hu Tao's:
http://lists.nongnu.org/archive/html/qemu-devel/2013-08/msg00124.html

No need to hard-code pvpanic as part of the machine.
It can be added with "-device pvpanic" from command line (The next patch).
Anyway, for backport compatibility it is still part of 1.5
machine.

Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
Reviewed-by: Hu Tao <hutao@cn.fujitsu.com>
Message-id: 1376233843-19410-2-git-send-email-marcel.a@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
hw/misc: make pvpanic known to user

This patch is based on Hu Tao's:
http://lists.nongnu.org/archive/html/qemu-devel/2013-08/msg00125.html

The pvpanic device may be enabled now with "-device pvpanic"
from command line.

Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
Reviewed-by: Hu Tao <hutao@cn.fujitsu.com>
Message-id: 1376233843-19410-3-git-send-email-marcel.a@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
pc: drop external DSDT loading

This breaks migration and is unneeded with modern SeaBIOS.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Message-id: 1376316104-11269-1-git-send-email-aliguori@us.ibm.com
Merge remote-tracking branch 'afaerber/tags/qom-cpu-for-anthony' into staging

QOM CPUState refactorings

* Fix X86CPU Westmere CPUID for pc-*-1.4 and older

* afaerber/tags/qom-cpu-for-anthony:
  pc: Remove PCLMULQDQ from Westmere on pc-*-1.4 and older

Conflicts:
	hw/i386/pc_piix.c
	hw/i386/pc_q35.c

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Update version for 1.6.0-rc3

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>