wct4xxp: Ensure all spans are configured by default.

Not configuring all the spans on an octal card can result in some of the
spans not working in clear channel modes.

Now ensure that all spans receive a default configuration regardless how
they are configured from user space.

Internal-Issue-ID: DAHLIN-289
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10728 a0bf4364-ded3-4de4-8d8a-66a801d63aff
wct4xxp: Companding on VPM needs to be changed when switching linemodes.

If a user switches linemode with sysfs, the VPM would never switch the
companding mode to alaw, and the result would be extreme static on all channels
of the span when the VPM is enabeld.

Now if the deflaw of the span has changed when an echocan is created, the
companding mode of the VPM channel is changed.

Signed-off-by: Shaun Ruffell <sruffell@digium.com>

Conflicts:
	drivers/dahdi/wct4xxp/base.c