ACPI: make acpi_create_platform_device() an external API

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 807cbc4..2c24c2c 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -432,6 +432,7 @@
 int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *);
 int acpi_device_modalias(struct device *, char *, int);
 
+struct platform_device *acpi_create_platform_device(struct acpi_device *);
 #define ACPI_PTR(_ptr)	(_ptr)
 
 #else	/* !CONFIG_ACPI */