[PATCH 18/25] vmwgfx: minor dmabuf utilities cleanup

Add / fix some function comments. Don't move out an fbdev framebuffer when unused. Just unpin. Only have a single function that computes a SVGAGuestPtr from the buffer's current placement, and make it more versatile by accepting a struct ttm_buffer_object Signed-off-by: Thomas Hellstrom Reviewed-

[PATCH 18/25] vmwgfx: minor dmabuf utilities cleanup

Add / fix some function comments. Don't move out an fbdev framebuffer when unused. Just unpin. Only have a single function that computes a SVGAGuestPtr from the buffer's current placement, and make it more versatile by accepting a struct ttm_buffer_object Signed-off-by: Thomas Hellstrom Reviewed-