Staging:dgap: Fix open brace '{' following struct go on the same line in dgap.h

Fix checkpatch.pl issues with open brace '{'
following struct go on the same line in dgap.h

Signed-off-by: Ebru Akagunduz <ebru.akagunduz@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>