target: use \n as a separator for configuration

The command
| echo rd_pages=32768 > ramdisk/control

Does not work because it writes "rd_pages=32768\n" and the parser which
matches for "rd_pages=%d" does not recognize it due to the \n. One way
of fixing this would be using "echo -n" instead.
This patch adds \n to the list of separators so we don't have to use the
-n argument which I find is more convinient.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index ed7e053..91bf11a 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -497,7 +497,7 @@
 
 	orig = opts;
 
-	while ((ptr = strsep(&opts, ",")) != NULL) {
+	while ((ptr = strsep(&opts, ",\n")) != NULL) {
 		if (!*ptr)
 			continue;