s390/irq: use CR0 defines to define CR0_IRQ_SUBCLASS_MASK

Use existing CR0 defines to define CR0_IRQ_SUBCLASS_MASK instead of
open-coding the defines again.

Reviewed-by: Alexander Gordeev <[e-mail]>
Signed-off-by: Heiko Carstens <[e-mail]>
Signed-off-by: Vasily Gorbik <[e-mail]>

arch/s390/include/asm/irq.h

···
 #include <linux/percpu.h>
 #include <linux/cache.h>
 #include <linux/types.h>
+#include <asm/ctlreg.h>
 
 enum interruption_class {
 	IRQEXT_CLK,
···
 };
 
 #define CR0_IRQ_SUBCLASS_MASK					  \
-	((1UL << (63 - 30))  /* Warning Track */		| \
-	 (1UL << (63 - 48))  /* Malfunction Alert */		| \
-	 (1UL << (63 - 49))  /* Emergency Signal */		| \
-	 (1UL << (63 - 50))  /* External Call */		| \
-	 (1UL << (63 - 52))  /* Clock Comparator */		| \
-	 (1UL << (63 - 53))  /* CPU Timer */			| \
-	 (1UL << (63 - 54))  /* Service Signal */		| \
-	 (1UL << (63 - 57))  /* Interrupt Key */		| \
-	 (1UL << (63 - 58))  /* Measurement Alert */		| \
-	 (1UL << (63 - 59))  /* Timing Alert */			| \
-	 (1UL << (63 - 62))) /* IUCV */
+	(CR0_WARNING_TRACK					| \
+	 CR0_MALFUNCTION_ALERT_SUBMASK				| \
+	 CR0_EMERGENCY_SIGNAL_SUBMASK				| \
+	 CR0_EXTERNAL_CALL_SUBMASK				| \
+	 CR0_CLOCK_COMPARATOR_SUBMASK				| \
+	 CR0_CPU_TIMER_SUBMASK					| \
+	 CR0_SERVICE_SIGNAL_SUBMASK				| \
+	 CR0_INTERRUPT_KEY_SUBMASK				| \
+	 CR0_MEASUREMENT_ALERT_SUBMASK				| \
+	 CR0_ETR_SUBMASK					| \
+	 CR0_IUCV)
 
 void irq_subclass_register(enum irq_subclass subclass);
 void irq_subclass_unregister(enum irq_subclass subclass);