virito_pci libray: hide vp_modern_map_capability()

No user now and the capability should not be setup
externally. Instead, every access to the capability should be done via
virtio_pci_modern_device.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210415073147.19331-6-jasowang@redhat.comSigned-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>

drivers/virtio/virtio_pci_modern_dev.c

@@ -16,11 +16,10 @@
  *
  * Returns the io address of for the part of the capability
  */
-void __iomem *vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
-				       size_t minlen,
-				       u32 align,
-				       u32 start, u32 size,
-				       size_t *len)
+static void __iomem *
+vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
+			 size_t minlen, u32 align, u32 start, u32 size,
+			 size_t *len)
 {
 	struct pci_dev *dev = mdev->pci_dev;
 	u8 bar;
@@ -90,7 +89,6 @@ void __iomem *vp_modern_map_capability(struct virtio_pci_modern_device *mdev, in
 			length, offset, bar);
 	return p;
 }
-EXPORT_SYMBOL_GPL(vp_modern_map_capability);
 
 /**
  * virtio_pci_find_capability - walk capabilities to find device info.

include/linux/virtio_pci_modern.h

@@ -99,11 +99,6 @@ void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev,
 u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
 			     u16 idx);
 u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev);
-void __iomem *vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
-				       size_t minlen,
-				       u32 align,
-				       u32 start, u32 size,
-				       size_t *len);
 void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
                               u16 index);
 int vp_modern_probe(struct virtio_pci_modern_device *mdev);