pinctrl: sprd: Combine the condition of MISC_PIN and COMMON_PIN

pinctrl: sprd: Combine the condition of MISC_PIN and COMMON_PIN

Since the follow-up pin design on Spreadtrum platform has some changes,
some configuration of MISC_PIN moved to COMMON_PIN. To support current
pin design and keep backward compatibility, we should combine the
condition of MISC_PIN and COMMON_PIN to configure an individual pin.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Link: https://lore.kernel.org/r/17af5e761e0515d288a7ea4078ac9aa4a82a7a4e.1564048446.git.baolin.wang@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>