ENGR00154226-2 IPUv3 FB:Improve driver

1) Current blank information should be unblank if
   we return back from mxcfb_set_par() function
   successfully.
2) Remove bypassing the suspend handling for
   overlay framebuffer for Android.
3) Synchronize fb unblanking operation bewteen
   Android early suspend and mxcfb_set_par() to
   avoid fb being unblanked after early suspend
   is done, as Android early suspend doesn't
   guarantee fb cannot be operated after early
   suspend.

Signed-off-by: Liu Ying <Ying.Liu@freescale.com>

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