ACPI: replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 3fac011..b26e301 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -966,7 +966,7 @@
 	case ACPI_BUS_TYPE_DEVICE:
 		status = acpi_get_object_info(handle, &buffer);
 		if (ACPI_FAILURE(status)) {
-			printk(KERN_ERR PREFIX "%s: Error reading device info\n", __FUNCTION__);
+			printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__);
 			return;
 		}