radeonsi: fix VAAPI segfault due to various bugs

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111236

src/gallium/drivers/radeon/radeon_video.c

@@ -178,6 +178,7 @@ void si_vid_join_surfaces(struct si_context *sctx,
 				surfaces[i]->u.gfx9.offset[j] += off;
 		}
 
+		surfaces[i]->flags |= RADEON_SURF_IMPORTED;
 		off += surfaces[i]->surf_size;
 	}
 

src/gallium/drivers/radeonsi/si_texture.c

@@ -1863,6 +1863,7 @@ static bool si_can_invalidate_texture(struct si_screen *sscreen,
 				      const struct pipe_box *box)
 {
 	return !tex->buffer.b.is_shared &&
+		!(tex->surface.flags & RADEON_SURF_IMPORTED) &&
 		!(transfer_usage & PIPE_TRANSFER_READ) &&
 		tex->buffer.b.b.last_level == 0 &&
 		util_texrange_covers_whole_level(&tex->buffer.b.b, 0,

src/gallium/drivers/radeonsi/si_uvd.c

@@ -96,6 +96,7 @@ struct pipe_video_buffer *si_video_buffer_create(struct pipe_context *pipe,
 		/* reset the address */
 		resources[i]->buffer.gpu_address = ctx->ws->buffer_get_virtual_address(
 			resources[i]->buffer.buf);
+		resources[i]->buffer.bo_size = resources[i]->buffer.buf->size;
 	}
 
 	vidtemplate.height *= array_size;