[S390] Missing blank when appending cio_ignore kernel parameter

When appending the 'cio_ignore' kernel parameter to the command line, a blank
has to be inserted in order to separate 'cio_ignore' from the preceding kernel
parameters.

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 51d6309..7e1bfb9 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -300,6 +300,7 @@
 	else
 		sprintf(str, "cio_ignore=all,!0.0.%04x",
 			ipl_info.data.fcp.dev_id.devno);
+	strcat(COMMAND_LINE, " ");
 	strcat(COMMAND_LINE, str);
 	console_loglevel = 2;
 }