drm/gma500: Remove addr_space field from psb_framebuffer

The field 'addr_space' in struct psb_framebuffer serves no
purpose. Remove it.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191122100545.16812-2-tzimmermann@suse.de

drivers/gpu/drm/gma500/framebuffer.c

@@ -153,8 +153,6 @@ static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 	if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
 		return -EINVAL;
 
-	if (!psbfb->addr_space)
-		psbfb->addr_space = vma->vm_file->f_mapping;
 	/*
 	 * If this is a GEM object then info->screen_base is the virtual
 	 * kernel remapping of the object. FIXME: Review if this is

drivers/gpu/drm/gma500/framebuffer.h

@@ -15,7 +15,6 @@
 
 struct psb_framebuffer {
 	struct drm_framebuffer base;
-	struct address_space *addr_space;
 	struct fb_info *fbdev;
 };