r9720 disabled the LEDs on the front panel of the TDM410. This commit restores the behavior and clarify which part of the TDM410 eframes control the LED operation. (closes issue #18939) Signed-off-by: Shaun Ruffell <sruffell@digium.com> git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9827 a0bf4364-ded3-4de4-8d8a-66a801d63aff