arm64: Hyper-V: vPCI: Adding Hyper-V PCI protocol 1.4

This is enabling the PCI protocol 1.4 and corresponding structures
in order to support arm64 Hyper-V.

This is the 2nd of the three patches to enable Hyper-V vPCI support
in arm64.

Reviewed by: whu
Tested by: Souradeep Chakrabarti <schakrabarti@microsoft.com>
Obtained from: Souradeep Chakrabarti <schakrabarti@microsoft.com>
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D37780