alpha: Use generic irq Kconfig

Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Richard Henderson <rth@twiddle.net>

arch/alpha/Kconfig

@@ -8,6 +8,9 @@ config ALPHA
 	select HAVE_IRQ_WORK
 	select HAVE_PERF_EVENTS
 	select HAVE_DMA_ATTRS
+	select HAVE_GENERIC_HARDIRQS
+	select GENERIC_IRQ_PROBE
+	select AUTO_IRQ_AFFINITY if SMP
 	help
 	  The Alpha is a 64-bit general-purpose processor designed and
 	  marketed by the Digital Equipment Corporation of blessed memory,
@@ -68,19 +71,6 @@ config GENERIC_IOMAP
 	bool
 	default n
 
-config GENERIC_HARDIRQS
-	bool
-	default y
-
-config GENERIC_IRQ_PROBE
-	bool
-	default y
-
-config AUTO_IRQ_AFFINITY
-	bool
-	depends on SMP
-	default y
-
 source "init/Kconfig"
 source "kernel/Kconfig.freezer"