dtbo

During the suspend process, the bridge disabling first disables the
LVDS module and then the DPI module. Specifically, mtk_lvds_poweroff()
is called first, followed by mtk_dpi_power_off().

However, disabling the dpix in mtk_lvds_poweroff() causes
mtk_dpi_disable(), which is called in mtk_dpi_power_off(), to hang.

As a result, the dpix clock must be disabled after mtk_dpi_disable() is
called. Therefore, disabling the dpix clock is moved to the DPI module.

Change-Id: I3d5d0c7ded203421f49e905654b5e335ac65a162
CR-Id: AUTO00347939
Signed-off-by: Tommy Chen <tommyyl.chen@mediatek.com>