microblaze: Enable SPARSE_IRQ

Enabling SPARSE_IRQ to use dynamically allocated irq descriptors.

Signed-off-by: Mubin Sayyed <mubinusm@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index c9c4be8..a75896f 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -46,6 +46,7 @@
 	select VIRT_TO_BUS
 	select CPU_NO_EFFICIENT_FFS
 	select MMU_GATHER_NO_RANGE if MMU
+	select SPARSE_IRQ
 
 # Endianness selection
 choice
diff --git a/arch/microblaze/include/asm/irq.h b/arch/microblaze/include/asm/irq.h
index d785def..eac2fb4 100644
--- a/arch/microblaze/include/asm/irq.h
+++ b/arch/microblaze/include/asm/irq.h
@@ -9,7 +9,6 @@
 #ifndef _ASM_MICROBLAZE_IRQ_H
 #define _ASM_MICROBLAZE_IRQ_H
 
-#define NR_IRQS		(32 + 1)
 #include <asm-generic/irq.h>
 
 struct pt_regs;