pinctrl: sprd: Fix the incorrect pull-up definition

The bits of pull up resistor selection were defined mistakenly,
thus fix them.

Fixes: 41d32cfc ("pinctrl: sprd: Add Spreadtrum pin control driver")
Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Link: https://lore.kernel.org/r/e973f8f194ce4cb2639121572e8621b5efa5bfbe.1588823152.git.baolin.wang7@gmail.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>