MFC r355648-r355649

r355648:
arm64: rockchip: rk_pinctrl: Add bias parsing based on the SoC type

Not all rockchip have the same value for pullup/pulldown so add a function
per SoC and call the right one to have the proper value.

r355649:
arm64: rockchip: rk_pinctrl: Fix parse_bias for RK3399

Only bank 0 and bank 2 are different than other rockchip SoC, fix this.
While here remove some debug printfs that where added in r355648

X-MFC-With: r355648