MLK-11215: hdmi: Fix hdmi hang issue on some specific monitor

hdmi will hang when cable connect from DVI monitor to
some specific hdmi monitor.
The issue can duplicate as followed steps:
1. boot up device, hdmi display as second display.
2. unblank hdmi display, then connect cable to DVI monitor.
3. connect cable to HDMI monitor.
After the cable connect changed, hdmi work mode will change
from DVI to hdmi mode, but video mode is not changed.
hdmi overflow interrupter can't been clean in such process.
Check hdmi work mode, and reconfigure fb and hdmi if work mode
change.

Signed-off-by: Sandor Yu <R01008@freescale.com>