s390: fix new ccwgroup.h kernel-doc warning
s390: fix new ccwgroup.h kernel-doc warning

Fix new s390 kernel-doc warning:

Warning(arch/s390/include/asm/ccwgroup.h:27): No description found for parameter 'ungroup_work'

Signed-off-by: Randy Dunlap <6f29df8e90a57f1ba61ffd63b0468c86bb6d3a99@infradead.org>
Cc:	Sebastian Ott <34be3ca399e9e73d80098c083a5b58614c3ca6da@linux.vnet.ibm.com>
Cc:	Peter Oberparleiter <e296756d5edaffcdbc7b9904859492ff25d3fce5@linux.vnet.ibm.com>
Cc:e7942067728a9355669d9ca933b92458ee2d98e6@vger.kernel.org
Cc:	Martin Schwidefsky <52616596d8f5df0d597e85ab515377f92f939c68@de.ibm.com>
Cc:	Heiko Carstens <8dcf0f69152f32f23184f83357a3731522e56b9c@de.ibm.com>
Cc:671709c74535acba5e93e3c4980531e485e898bb@de.ibm.com
Signed-off-by: Sebastian Ott <34be3ca399e9e73d80098c083a5b58614c3ca6da@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <52616596d8f5df0d597e85ab515377f92f939c68@de.ibm.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs