Staging: comedi: Fix 'unsigned' warning style

This patch fixes the checkpatch.pl warning:

WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
+       unsigned runflags;

WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
+struct comedi_device *comedi_dev_get_from_minor(unsigned minor);

Signed-off-by: Aniket Sharma <badbuddha91@gmail.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>