WiringPi: Improve logic of getting board information

Now WiringPi doesn't require editted /proc/cpuinfo if a proper model
name is defined in target board's device tree.

Signed-off-by: Deokgyu Yang <secugyu@gmail.com>
Change-Id: I94b6b9595577546d785f018258746032bf9a9494
1 file changed