fbdev fixes for 3.18

* Fix fb console option parsing
* Fixes for OMAPDSS/OMAPFB crashes related to module unloading and
  device/driver binding & unbinding.
* Fix for OMAP HDMI PLL locking failing in certain cases
* Misc minor fixes for atmel lcdfb and OMAP
Merge branch '3.18/omapdss-fixes' into 3.18/fbdev-fixes