[Exynos5422] Device Tree GPIO 설정

samsung.pin-function = < >;

0 : input

1 : output

2 : special function

samsung.pin-pud = < >;

0 : reserved

1 : pull down

2 : reserved

3 : pull up

samsung.pin-con-pdn = < >;

0 : output 0

1 : output 1

2 : input

3 : previous state

samsung.pin-pud-pdn = < >;

0 : pull up/down disable

1 : pull down

2 : reserved

3 : pull up