pinctrl: nomadik: Kconfig: Remove repeated config dependency

remove it because "if (ARCH_U8500 || ARCH_NOMADIK)" is already used

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Link: https://lore.kernel.org/r/20210825082536.2547-1-caihuoqing@baidu.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>