staging: rtl8192e: Remove dead code: dig_t::dbg_mode, drx_path_sel::DbgMode

dig_t::dbg_mode and drx_path_sel::DbgMode are initialized to one value and
checked only once in code.This patch throws them away, and deletes
always-true conditions.

Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>