ACPI: un-export ACPI_ERROR() -- use printk(KERN_ERR...)

Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index c1d4705..65bdcde 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -203,7 +203,7 @@
 
 	result = acpi_bus_get_power(fan->handle, &state);
 	if (result) {
-		ACPI_ERROR((AE_INFO, "Reading power state"));
+		printk(KERN_ERR PREFIX "Reading power state\n");
 		goto end;
 	}