ACPI: remove unnecessary #ifdef CONFIG_DMI

acpi_osi_setup() does not depend on CONFIG_DMI
acpi_dmi_osi_linux()'s definition doesn't depend on CONFIG_DMI either
Signed-off-by: Len Brown <len.brown@intel.com>

include/linux/acpi.h

@@ -217,10 +217,8 @@ static inline int acpi_video_display_switch_support(void)
 #endif /* defined(CONFIG_ACPI_VIDEO) || defined(CONFIG_ACPI_VIDEO_MODULE) */
 
 extern int acpi_blacklisted(void);
-#ifdef CONFIG_DMI
 extern void acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d);
 extern int acpi_osi_setup(char *str);
-#endif
 
 #ifdef CONFIG_ACPI_NUMA
 int acpi_get_pxm(acpi_handle handle);