staging: keucr: smilmain.c: cosmetic updates

* Move Check_D_MediaFmt() implementation up in smilmain.c to keep all the
  non-static functions at the top of the file;
* Remove unnecessary extern and newlines from "init.h";

Signed-off-by: Tair Rzayev <tair.rzayev@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>