ACPI: Move acpi_blacklisted() declaration to asm/acpi.h

The function acpi_blacklisted() is defined only when CONFIG_X86 is
enabled and is only used by X86 arch code. To align with its usage and
definition conditions, move its declaration to asm/acpi.h
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[ rjw: Added empty code line in a header file ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

arch/x86/include/asm/acpi.h

@@ -56,6 +56,8 @@ static inline void disable_acpi(void)
 
 extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
 
+extern int acpi_blacklisted(void);
+
 static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
 static inline void acpi_disable_pci(void)
 {

include/linux/acpi.h

@@ -421,7 +421,7 @@ extern char *wmi_get_acpi_device_uid(const char *guid);
 
 extern char acpi_video_backlight_string[];
 extern long acpi_is_video_device(acpi_handle handle);
-extern int acpi_blacklisted(void);
+
 extern void acpi_osi_setup(char *str);
 extern bool acpi_osi_is_win8(void);