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

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

Update firmware for wpi(4) from version 2.14.4 to 15.32.2.9.

PR: kern/142907
Submitted by: Craig Butler <craig001 at lerwick.hopto.org>
MFC after: 2 weeks

the 3945 firmware license does not require acknowledging the EULA,
remove the sysctl ack requirement

Pointed out by: Joerg Sonnenberger
Reviewed by: thompsa
Approved by: core

Initial Import of wpi driver based on p4 changeset 128641.

This import includes:
o wpi Wireless driver for the Intel 3945 Wireless Lan Controller (802.11abg) (sys/dev/wpi)
o Intel firmware revision 2.14.4 & associated LICENSE (sys/dev/contrib/wpi, sys/contrib/dev/wpi/LICENSE)
o wpifw Firmware driver (sys/modules/wpifw)

Approved by: mlaier, sam (co-mentors)