Merge r210524 from head:

Merge r210524 from head:

  - Support two devices made by West Mountain Radio in uslcom(4) [1]

  - Remove duplicate SILABS CP2102 define from usbdevs

Merge r211022 from head:

  Sync the list of devices supported by uslcom(4) with NetBSD, Linux, OpenBSD
  and BeOS.  The devices supported by uslcom(4) are now in sync with:

  NetBSD  src/sys/dev/usb/uslsa.c 1.11
  OpenBSD src/sys/dev/usb/uslcom.c 1.20
  Linux   source/drivers/usb/serial/cp210x.c from kernel 2.6.35
  BeOS    usb_serial/driver.c 1.32

  Two vendor/product IDs from Linux have not been added to uslcom(4):
    SILABS SAEL - This device has special code in u3g to support it
    SILABS GSM2228 - I suspect this should also be covered by u3g(4).

PR:		usb/131912 [1]
Submitted by:	Jack Twilley <mathuin gmail.com> [1]

git-svn-id: svn://svn.freebsd.org/base/stable/8@211470 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f