drm/hyperv : Removing the restruction of VRAM allocation with PCI bar size
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2030922
Hyper-V DRM driver uses MMIO address from PCI bar directly but in some cases the memory is already used by some other device. Switch to always using vmbus_allocate_mmio() which has the required protection.
Signed-off-by: Vitaly Kuznetsov vkuznets@redhat.com