Support both GPU PCI bus address formats
Support both GPU PCI bus address formats

The NVIDIA procfs file currently uses the format:

xxxx:xx.xx.x

But everywhere else (lspci, sysfs, xapi/xenopsd) uses the format:

xxxx:xx:xx.x

This change means that the NVIDIA unbind code understands both
formats,
in case the procfs file changes in future to use the format used
elsewhere.

Imported from xen-api.git 2826ac93c70bdf0de600fbfd1b68325661c882e6

Signed-off-by: John Else <37b74501daa612e48fea94f9846ed4ddeb6a8f07@citrix.com>
Imported-by: John Else <37b74501daa612e48fea94f9846ed4ddeb6a8f07@citrix.com>

thomassa/xenopsd,djs55/xenopsd,djs55/xenopsd,djs55/xenopsd-previous,djs55/xenopsd,johnelse/xenopsd,cheng--zhang/xenopsd,euanh/xenopsd,simonjbeaumont/xenopsd,thomassa/xenopsd,koushikcgit/xenopsd,euanh/xenopsd,djs55/xenopsd-previous,koushikcgit/xenopsd,euanh/xenopsd,thomassa/xenopsd,johnelse/xenopsd,simonjbeaumont/xenopsd,koushikcgit/xenopsd,johnelse/xenopsd,cheng--zhang/xenopsd,simonjbeaumont/xenopsd,djs55/xenopsd-previous,cheng--zhang/xenopsd