PCI: pciehp: Declare pciehp_enable/disable_slot() static

No callers of pciehp_enable/disable_slot() outside of pciehp_ctrl.c
remain, so declare the functions static.  For now this requires forward
declarations.  Those can be eliminated by reshuffling functions once the
ongoing effort to refactor the driver has settled.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/hotplug/pciehp.h

@@ -177,8 +177,6 @@ void pciehp_queue_pushbutton_work(struct work_struct *work);
 struct controller *pcie_init(struct pcie_device *dev);
 int pcie_init_notification(struct controller *ctrl);
 void pcie_shutdown_notification(struct controller *ctrl);
-int pciehp_enable_slot(struct slot *p_slot);
-int pciehp_disable_slot(struct slot *p_slot);
 void pcie_reenable_notification(struct controller *ctrl);
 int pciehp_power_on_slot(struct slot *slot);
 void pciehp_power_off_slot(struct slot *slot);

drivers/pci/hotplug/pciehp_ctrl.c

@@ -122,6 +122,9 @@ static void remove_board(struct slot *p_slot)
 	pciehp_green_led_off(p_slot);
 }
 
+static int pciehp_enable_slot(struct slot *slot);
+static int pciehp_disable_slot(struct slot *slot);
+
 void pciehp_request(struct controller *ctrl, int action)
 {
 	atomic_or(action, &ctrl->pending_events);
@@ -308,7 +311,7 @@ static int __pciehp_enable_slot(struct slot *p_slot)
 	return board_added(p_slot);
 }
 
-int pciehp_enable_slot(struct slot *slot)
+static int pciehp_enable_slot(struct slot *slot)
 {
 	struct controller *ctrl = slot->ctrl;
 	int ret;
@@ -342,7 +345,7 @@ static int __pciehp_disable_slot(struct slot *p_slot)
 	return 0;
 }
 
-int pciehp_disable_slot(struct slot *slot)
+static int pciehp_disable_slot(struct slot *slot)
 {
 	int ret;