[PATCH -next] drm/mediatek: Fix Kconfig warning

[YueHaibing]

WARNING: unmet direct dependencies detected for MTK_MMSYS
  Depends on [n]: (ARCH_MEDIATEK [=y] || COMPILE_TEST [=n]) && COMMON_CLK_MT8173_MMSYS [=n]
  Selected by [y]:
  - DRM_MEDIATEK [=y] && HAS_IOMEM [=y] && DRM [=y] && (ARCH_MEDIATEK [=y] || ARM && COMPILE_TEST [=n]) && COMMON_CLK [=y] && HAVE_ARM_SMCCC [=y] && OF [=y]

Add missing dependcy COMMON_CLK_MT8173_MMSYS to fix this.

Fixes: 2c758e301ed9 ("soc / drm: mediatek: Move routing control to mmsys device")
Signed-off-by: YueHaibing <yuehaibing at huawei.com>
---
 drivers/gpu/drm/mediatek/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/mediatek/Kconfig b/drivers/gpu/drm/mediatek/Kconfig
index c420f5a3d33b..4d9b5540de68 100644
--- a/drivers/gpu/drm/mediatek/Kconfig
+++ b/drivers/gpu/drm/mediatek/Kconfig
@@ -6,6 +6,7 @@ config DRM_MEDIATEK
 	depends on COMMON_CLK
 	depends on HAVE_ARM_SMCCC
 	depends on OF
+	depends on COMMON_CLK_MT8173_MMSYS
 	select DRM_GEM_CMA_HELPER
 	select DRM_KMS_HELPER
 	select DRM_MIPI_DSI
-- 
2.17.1