sparseirq: fix !SMP building, #2

Impact: build fix

make intr_remapping.c to include smp.h, so could use boot_cpu_id there

also remove old change that disabling sparseirq with !SMP
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/Kconfig

@@ -240,7 +240,7 @@ config X86_HAS_BOOT_CPU_ID
 
 config SPARSE_IRQ
 	bool "Support sparse irq numbering"
-	depends on (PCI_MSI || HT_IRQ) && SMP
+	depends on PCI_MSI || HT_IRQ
 	default y
 	help
 	  This enables support for sparse irq, esp for msi/msi-x. You may need

drivers/pci/intr_remapping.c

@@ -5,6 +5,7 @@
 #include <linux/pci.h>
 #include <linux/irq.h>
 #include <asm/io_apic.h>
+#include <asm/smp.h>
 #include <linux/intel-iommu.h>
 #include "intr_remapping.h"