drm/msm/hdmi: Replace of_gpio.h by proper one

drm/msm/hdmi: Replace of_gpio.h by proper one

of_gpio.h is deprecated and subject to remove.
The driver doesn't use it directly, replace it
with what is really being used.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/585634/
Link: https://lore.kernel.org/r/20240304175152.1199270-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>