staging: dgnc: Fix block comment style

This patch fixes the block comment style.
1. The checkpatch.pl warning:
Block comments use a trailing */ on a separate line.
2. '====' separator is unnecessary and should not be used.

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