ARC: irq: export some IRQs again

This will be needed for switching to linear irq domain as
irq_create_mapping() called by intr code needs the IRQ numbers
in addition to existing usage in mcip.c for requesting the irq
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>

arch/arc/include/asm/irq.h

@@ -12,6 +12,12 @@
 #define NR_CPU_IRQS	32  /* number of interrupt lines of ARC770 CPU */
 #define NR_IRQS		128 /* allow some CPU external IRQ handling */
 
+/* Platform Independent IRQs */
+#ifdef CONFIG_ISA_ARCV2
+#define IPI_IRQ		19
+#define SOFTIRQ_IRQ	21
+#endif
+
 #include <linux/interrupt.h>
 #include <asm-generic/irq.h>
 

arch/arc/kernel/mcip.c

@@ -15,9 +15,6 @@
 #include <asm/mcip.h>
 #include <asm/setup.h>
 
-#define IPI_IRQ		19
-#define SOFTIRQ_IRQ	21
-
 static char smp_cpuinfo_buf[128];
 static int idu_detected;