staging: dgnc: Break line after boolean operator

The preferred way to break up long math lines is to break after an arthimetic
or boolean operator. This patch fixes the checkpatch.pl warning:
Logical continuations should be on the previous line.

Signed-off-by: Rehas Sachdeva <aquannie@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>