ACPI: thinkpad-acpi: rename register_ibmacpi_subdriver

Rename register_ibmacpi_subdriver to register_tpacpi_subdriver, as
we are not called ibmacpi anymore.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index 015c02b..b86e574 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -157,7 +157,7 @@
 static void dispatch_notify(acpi_handle handle, u32 event, void *data);
 static int setup_notify(struct ibm_struct *ibm);
 static int ibm_device_add(struct acpi_device *device);
-static int register_ibmacpi_subdriver(struct ibm_struct *ibm);
+static int register_tpacpi_subdriver(struct ibm_struct *ibm);
 
 
 /*