OvmfPkg/IncompatiblePciDeviceSupportDxe: Refine the configuration

OvmfPkg/IncompatiblePciDeviceSupportDxe: Refine the configuration

RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429

MMIO64_PREFERENCE is a fixed length data structure which contains one
AddressSpaceDesc and one EndDesc. This patch removes MMIO64_PREFERENCE
and create AddressSpaceDesc and EndDesc respectively. This change
gives the chance to add more AddressSpaceDesc when CheckDevice is
called.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>