wcte43x: Add support for new te436/te236 cards

Adds driver support for Digium's new te436 and te236 quad and dual span T1/E1 cards.

[removed whitespace at end of line]
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
wcte43x: Fix failure to download firmware.

The firmware/Makefile missed a line that added the firmware for the TE436 to the
download list.

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