staging: olpc_dcon: olpc_dcon: Fix spaces between operator and variables.

This issue is caught by checkpatch.pl and is related to the following
warning:
	- CHECK: spaces preferred around that '/' (ctx:VxV)

Signed-off-by: Emmanuil Chatzipetru <chatzi.emanuel@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>