staging/mei: struct amt_wd_dev' should it be static

fix sparse warning:
'amt_wd_dev' was not declared. Should it be static

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed