This commit adds field upgradeable support for the TE820 firmware. Firmware can now be silently upgraded as part of updating drivers like most of the existing DAHDI firmware. Previous versions of dual and quad span cards did not support upgrading firmware in the field. Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com> Fixed up some checkpatch issues: Signed-off-by: Shaun Ruffell <sruffell@digium.com> git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10291 a0bf4364-ded3-4de4-8d8a-66a801d63aff