pinctrl: ingenic: Fix bias config for X2000(E)

The ingenic_set_bias() function's "bias" argument is not a
"enum pin_config_param", so its value should not be compared against
values of that enum.

This should fix the bias config not working on the X2000(E) SoCs.

Fixes: 943e0da1 ("pinctrl: Ingenic: Add pinctrl driver for X2000.")
Cc: <stable@vger.kernel.org> # v5.12
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Tested-by: 周琰杰 (Zhou <Yanjie)&lt;zhouyanjie@wanyeetech.com>
Link: https://lore.kernel.org/r/20210717174836.14776-2-paul@crapouillou.net


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