s390/css: unneeded initialization in for_each_subchannel
s390/css: unneeded initialization in for_each_subchannel

The ret variable is always set by the fn function.
There is no need to initialize it.

Signed-off-by: Pierre Morel <d95f280a221ff712ada79312579d6df6c67a2d03@linux.vnet.ibm.com>
Reviewed-By: Sascha Silbe <be4224c72adedf72d459320ee497e22a37089288@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <94980dd689360e06f79e918bf71ea5fed7a2bc63@de.ibm.com>
Signed-off-by: Martin Schwidefsky <52616596d8f5df0d597e85ab515377f92f939c68@de.ibm.com>

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