[S390] qdio: improve s390 debug feature usage

Improve s390 debug feature usage:
- log busy bit in dbf
- increase size of dbf views
- consistent logging of qdio api calls to setup view
- print subchannel number so one can associate the interface
  with the dbf data
- only log events to one view

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --cc drivers/s390/cio/qdio_debug.h
Simple merge

diff --cc drivers/s390/cio/qdio_main.c
Simple merge

diff --cc drivers/s390/cio/qdio_setup.c
Simple merge