[S390] tape: add support for irq statistics

Add support for ccw based tape I/O interrupt statistics in /proc/interrupts.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index 8c24141..5d7b6fbb 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -37,6 +37,7 @@
 	{.name = "DAS", .desc = "[I/O] DASD" },
 	{.name = "C15", .desc = "[I/O] 3215" },
 	{.name = "C70", .desc = "[I/O] 3270" },
+	{.name = "TAP", .desc = "[I/O] Tape" },
 	{.name = "NMI", .desc = "[NMI] Machine Check" },
 };