MFC 199974:

MFC 199974:
Remove extra parantheses from usb_ethernet.c and usb_serial.c lines.
config(8) doesn't parse parantheses and instead treated them as being
part of the device driver name (e.g. '(u3g' vs 'u3g').  While here, fix the
style of these long lines to match the wrapping used for other long lines
in this file.

git-svn-id: svn://svn.freebsd.org/base/stable/8@200222 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f