[PATCH v2] x86/pci: fix intel_mid_pci.c build error when ACPI is not enabled

[Randy Dunlap <rdunlap@infradead.org>]

From: Randy Dunlap <rdunlap@infradead.org>

Fix build error when CONFIG_ACPI is not set/enabled by adding
the header file <asm/acpi.h> which contains a stub for the function
in the build error.

../arch/x86/pci/intel_mid_pci.c: In function ‘intel_mid_pci_init’:
../arch/x86/pci/intel_mid_pci.c:303:2: error: implicit declaration of function ‘acpi_noirq_set’; did you mean ‘acpi_irq_get’? [-Werror=implicit-function-declaration]
  acpi_noirq_set();

Fixes: a912a7584ec3 ("x86/platform/intel-mid: Move PCI initialization to arch_init()")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: stable@vger.kernel.org	# v4.16+
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Len Brown <lenb@kernel.org>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jesse Barnes <jsbarnes@google.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: linux-pci@vger.kernel.org
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Jesse Barnes <jsbarnes@google.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
---
Found in linux-next, but applies to/exists in mainline also.

v2:
- add Reviewed-by: and Acked-by: tags
- drop alternatives

 arch/x86/pci/intel_mid_pci.c |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20200813.orig/arch/x86/pci/intel_mid_pci.c
+++ linux-next-20200813/arch/x86/pci/intel_mid_pci.c
@@ -33,6 +33,7 @@
 #include <asm/hw_irq.h>
 #include <asm/io_apic.h>
 #include <asm/intel-mid.h>
+#include <asm/acpi.h>
 
 #define PCIE_CAP_OFFSET	0x100