r308797
update the hv_vmbus(4) manual by adding a dependency on pci

We enhanced the vmbus driver to support PCIe pass-through recently.

Reviewed by:        sephe
Approved by:        sephe (mentor)
Sponsored by:       Microsoft

r308798
remove the hv_ata_pci_disengage(4) manual

A few months ago, we removed the driver, which was not necessary any longer.

Reviewed by:        sephe
Approved by:        sephe (mentor)
Sponsored by:       Microsoft

r308799
fix share/man/man4/Makefile for hv_ata_pci_disengage.4

We need to remove the line since we removed the related manual just now.

Reviewed by:        sephe
Approved by:        sephe (mentor)
Sponsored by:       Microsoft

r309082
share/man/man4/Makefile: Only install Hyper-V man pages on amd64 and i386

We shouldn't install them on the architectures not supported by Hyper-V.

And, hv_ata_pci_disengage.4.gz should be removed from all architectures:
1) It should have only applied to Hyper-V;
2) For Hyper-V platforms (amd64 and i386), the related driver was removed by
r306426 | sephe | 2016-09-29 09:41:52 +0800 (Thu, 29 Sep 2016),
because now we have a better mechanism to disble the ata driver for hard
disks when the VM runs on Hyper-V.

Reviewed by:        sephe, andrew, jhb
Approved by:        sephe (mentor)
Sponsored by:       Microsoft
Differential Revision:      https://reviews.freebsd.org/D8572