hecubafb: use fb_sys_read()

Since hecubafb's framebuffer is vmalloc'ed, use fb_sys_read().

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>
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 19b7f73..5e3492c 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -611,6 +611,7 @@
        select FB_SYS_FILLRECT
        select FB_SYS_COPYAREA
        select FB_SYS_IMAGEBLIT
+       select FB_SYS_FOPS
        select FB_DEFERRED_IO
        help
          This enables support for the Hecuba board. This driver was tested