cfag12864bfb: Use sys_ instead of cfb_ framebuffer accessors

Because the framebuffer memory is allocated system RAM, use the sys_ drawing
libraries. It also fixes the following compile error:

  LD      .tmp_vmlinux1
drivers/built-in.o:(.data+0x8b48): undefined reference to `cfb_fillrect'
drivers/built-in.o:(.data+0x8b50): undefined reference to `cfb_copyarea'
drivers/built-in.o:(.data+0x8b58): undefined reference to `cfb_imageblit'

[adaplas]
Use fb_sys_read/write for the same reasons as above.
Signed-off-by: Avuton Olrich <avuton@gmail.com>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/auxdisplay/Kconfig

@@ -68,6 +68,10 @@ config CFAG12864B
 	depends on X86
 	depends on FB
 	depends on KS0108
+	select FB_SYS_FILLRECT
+	select FB_SYS_COPYAREA
+	select FB_SYS_IMAGEBLIT
+	select FB_SYS_FOPS
 	default n
 	---help---
 	  If you have a Crystalfontz 128x64 2-color LCD, cfag12864b Series,

drivers/auxdisplay/cfag12864bfb.c

@@ -73,9 +73,11 @@ static int cfag12864bfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 
 static struct fb_ops cfag12864bfb_ops = {
 	.owner = THIS_MODULE,
-	.fb_fillrect = cfb_fillrect,
-	.fb_copyarea = cfb_copyarea,
-	.fb_imageblit = cfb_imageblit,
+	.fb_read = fb_sys_read,
+	.fb_write = fb_sys_write,
+	.fb_fillrect = sys_fillrect,
+	.fb_copyarea = sys_copyarea,
+	.fb_imageblit = sys_imageblit,
 	.fb_mmap = cfag12864bfb_mmap,
 };