UPSTREAM: pinctrl: sprd: Use the correct pin output configuration

The Spreadtrum pin controller did not supply registers to set high level
or low level for output mode, instead we should let the pin controller
current configuration drive values on the line. So we should use the
PIN_CONFIG_OUTPUT_ENABLE configuration to enable or disable the output
mode.

bug: 153500755
Change-Id: I290165a7239ddf75281d9a4eaf357cd576f1d009
[Baolin Wang changes the commit message]
Fixes: 41d32cfc ("pinctrl: sprd: Add Spreadtrum pin control driver")
Signed-off-by: Linhua Xu <linhua.xu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Link: https://lore.kernel.org/r/8a6f91b49c17beb218e46b23084f59a7c7260f86.1585124562.git.baolin.wang7@gmail.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
(cherry picked from commit bb0f472f96fa2bda2c3e412cd84f16b15d992a56)