gpio-langwell: do not use direct access to iomapped memory
We better to use readl() function instead of bad looking direct access. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NMika Westerberg <mika.westerberg@linux.intel.com> Acked-by: NDavid Cohen <david.a.cohen@intel.com> Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
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