vfio: Move vfio-region.h under hw/vfio/

Since the removal of vfio-platform, header file vfio-region.h no
longer needs to be a public VFIO interface. Move it under hw/vfio.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250901064631.530723-9-clg@redhat.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

include/hw/vfio/vfio-region.h

@@ -1,48 +0,0 @@
-/*
- * VFIO region
- *
- * Copyright Red Hat, Inc. 2025
- *
- * SPDX-License-Identifier: GPL-2.0-or-later
- */
-
-#ifndef HW_VFIO_REGION_H
-#define HW_VFIO_REGION_H
-
-#include "system/memory.h"
-
-typedef struct VFIOMmap {
-    MemoryRegion mem;
-    void *mmap;
-    off_t offset;
-    size_t size;
-} VFIOMmap;
-
-typedef struct VFIODevice VFIODevice;
-
-typedef struct VFIORegion {
-    struct VFIODevice *vbasedev;
-    off_t fd_offset; /* offset of region within device fd */
-    MemoryRegion *mem; /* slow, read/write access */
-    size_t size;
-    uint32_t flags; /* VFIO region flags (rd/wr/mmap) */
-    uint32_t nr_mmaps;
-    VFIOMmap *mmaps;
-    uint8_t nr; /* cache the region number for debug */
-    bool post_wr; /* writes can be posted */
-} VFIORegion;
-
-
-void vfio_region_write(void *opaque, hwaddr addr,
-                           uint64_t data, unsigned size);
-uint64_t vfio_region_read(void *opaque,
-                          hwaddr addr, unsigned size);
-int vfio_region_setup(Object *obj, VFIODevice *vbasedev, VFIORegion *region,
-                      int index, const char *name);
-int vfio_region_mmap(VFIORegion *region);
-void vfio_region_mmaps_set_enabled(VFIORegion *region, bool enabled);
-void vfio_region_unmap(VFIORegion *region);
-void vfio_region_exit(VFIORegion *region);
-void vfio_region_finalize(VFIORegion *region);
-
-#endif /* HW_VFIO_REGION_H */