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.c b/drivers/misc/thinkpad_acpi.c
index ddaedf8..cac73e5 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -345,7 +345,7 @@
 	return 0;
 }
 
-static int __init register_ibmacpi_subdriver(struct ibm_struct *ibm)
+static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 {
 	int ret;
 
@@ -2574,7 +2574,7 @@
 		return 0;
 
 	if (ibm->hid) {
-		ret = register_ibmacpi_subdriver(ibm);
+		ret = register_tpacpi_subdriver(ibm);
 		if (ret < 0)
 			return ret;
 		ibm->driver_registered = 1;