staging: keucr: fix sparse warning

fix sparse warning:
drivers/staging/keucr/smilmain.c:163:5: warning: symbol 'Check_D_MediaFmt' was not declared. Should it be static?

by declaring it in the right header. And remove duplication of definition of
SM_INIT

Signed-off-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>