Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Update the hptrr driver to version 1.2. This adds port multiplier support
for several cards. See the Highpoint website for more information. Again,
many thanks to Highpoint for their continued support of FreeBSD.

Add the 'hptrr' driver for supporting the following Highpoint RocketRAID
cards:

o RocketRAID 172x series
o RocketRAID 174x series
o RocketRAID 2210
o RocketRAID 222x series
o RocketRAID 2240
o RocketRAID 230x series
o RocketRAID 231x series
o RocketRAID 232x series
o RocketRAID 2340
o RocketRAID 2522

Many thanks to Highpoint for their continued support of FreeBSD.

Submitted by: Highpoint