ACPI: un-export ACPI_WARNING() -- use printk(KERN_WARNING...)

Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index 97856ad..2de40bd 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -196,7 +196,7 @@
 	}
 	/* TBD: Support duty_cycle values that span bit 4. */
 	else if ((pr->throttling.duty_offset + pr->throttling.duty_width) > 4) {
-		ACPI_WARNING((AE_INFO, "duty_cycle spans bit 4"));
+		printk(KERN_WARNING PREFIX "duty_cycle spans bit 4\n");
 		return_VALUE(0);
 	}