PCI/ACPI: rename pci_osc_control_set()

- Rename pci_osc_control_set() to acpi_pci_osc_control_set() according
  to the other API names in drivers/acpi/pci_root.c.

- Move _OSC related definitions to include/linux/acpi.h because _OSC
  related API is implemented in drivers/acpi/pci_root.c now.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Reviewed-by: Andrew Patterson <andrew.patterson@hp.com>
Tested-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 979eccc..196f97d 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -306,13 +306,13 @@
 }
 
 /**
- * pci_osc_control_set - commit requested control to Firmware
+ * acpi_pci_osc_control_set - commit requested control to Firmware
  * @handle: acpi_handle for the target ACPI object
  * @flags: driver's requested control bits
  *
  * Attempt to take control from Firmware on requested control bits.
  **/
-acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
+acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags)
 {
 	acpi_status status;
 	u32 control_req, result, capbuf[3];
@@ -359,7 +359,7 @@
 	mutex_unlock(&osc_lock);
 	return status;
 }
-EXPORT_SYMBOL(pci_osc_control_set);
+EXPORT_SYMBOL(acpi_pci_osc_control_set);
 
 static int __devinit acpi_pci_root_add(struct acpi_device *device)
 {