staging: unisys: fix directory warning

we were getting three warnings about timskmod and sparstopdriver
and channels. These warnings were about no such file or directory.
These directory names were included in the Makefile, but the
directories were not existing.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>