ODROID-XU3/4: Fix wiringPiISR.

If a pin is exported, ISR does not work on XU4.
We will clear pin before using with wiringPiISR function.

Signed-off-by: Steve Jeong <how2soft@gmail.com>
Change-Id: Ibc747fe30fda20253eb77d9bbe5f6bcc8c2180b8
1 file changed