target: avoid multiple outputs in scsi_dump_inquiry()

The multiple calls to pr_debug() each with one letter results in a new
line. This patch merges the multiple requests into one call per line
so we don't have the multiple line cuts.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>