Enabling v-PCI in FreeBSD in ARM64 Hyper-V second patch

[schakrabarti_microsoft.com]

Summary

This patch does remaining enablement in hyperv vpci driver to work on arm64 Hyper-V.
For that it required to use PCI protocol 1.4 and corresponding different PCI message handling.
Also new MSI allocation, MSI-X mapping, release.

Test Plan

Tested on Hyper-V x86 gen1, gen2 and ARM64 gen2.

[kpraveen.lkml_gmail.com]

sys/dev/hyperv/pcib/vmbus_pcib.c

168

Can we reorder this

PCI_PROTOCOL_VERSION_1_1,
PCI_PROTOCOL_VERSION_1_4

1909

Can we just put like this below and other places as applicable

#if defined(__aarch64__)
	return (intr_alloc_msi(pcib, dev, ACPI_MSI_XREF, count, maxcount, irqs));
#else
	return (PCIB_ALLOC_MSI(device_get_parent(pcib), dev, count, maxcount,
	    irqs));
#endif

[schakrabarti_microsoft.com]

sys/dev/hyperv/pcib/vmbus_pcib.c

168

This is intentional, to have PCI_PROTOCOL_VERSION_1_4 to be negotiated before PCI_PROTOCOL_VERSION_1_1.

[whu]

There are some style changes which I will correct when commit.