qemu: Support chardevs with ARM virt machines
qemu: Support chardevs with ARM virt machines

The function to check if -chardev is supported by QEMU was written a
long time ago, where adding chardevs did not make sense on the fixed ARM
platforms.  Since then, we now have a general purpose virt platform,
which should support plugging in any device over PCIe which is supported
in a similar fashion on x86.

Signed-off-by: Christoffer Dall <2c58c35362f9f538b58fc30c0db0d1c81cf60d96@linaro.org>
Reviewed-by: Andrea Bolognani <3ada0bee826c753786fdbba72243dfba997094cf@redhat.com>

jardasgit/libvirt,jardasgit/libvirt,andreabolognani/libvirt,libvirt/libvirt,olafhering/libvirt,datto/libvirt,olafhering/libvirt,eskultety/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,crobinso/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,eskultety/libvirt,jfehlig/libvirt,eskultety/libvirt,fabianfreyer/libvirt,zippy2/libvirt,eskultety/libvirt,jardasgit/libvirt,nertpinx/libvirt,datto/libvirt,datto/libvirt,olafhering/libvirt,crobinso/libvirt,crobinso/libvirt,nertpinx/libvirt,libvirt/libvirt,jfehlig/libvirt,zippy2/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,olafhering/libvirt,nertpinx/libvirt,andreabolognani/libvirt,crobinso/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,zippy2/libvirt,zippy2/libvirt,libvirt/libvirt,jardasgit/libvirt,andreabolognani/libvirt,eskultety/libvirt,libvirt/libvirt,andreabolognani/libvirt,datto/libvirt,datto/libvirt