[PATCH -next] drm/hisilicon/hibmc: Fix COMPILE_TEST building without MMU

[YueHaibing]

WARNING: unmet direct dependencies detected for DRM_TTM
  Depends on [n]: HAS_IOMEM [=y] && DRM [=y] && MMU [=n]
  Selected by [y]:
  - DRM_TTM_HELPER [=y] && HAS_IOMEM [=y] && DRM [=y]
  - DRM_HISI_HIBMC [=y] && HAS_IOMEM [=y] && DRM [=y] && PCI [=y] && (ARM64 || COMPILE_TEST [=y])

Add missing MMU dependency to fix this.

Fixes: a0f25a6bb319 ("drm/hisilicon/hibmc: Allow to be built if COMPILE_TEST is enabled")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/gpu/drm/hisilicon/hibmc/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/hisilicon/hibmc/Kconfig b/drivers/gpu/drm/hisilicon/hibmc/Kconfig
index 073adfe438dd..e5ef1b573732 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/Kconfig
+++ b/drivers/gpu/drm/hisilicon/hibmc/Kconfig
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config DRM_HISI_HIBMC
 	tristate "DRM Support for Hisilicon Hibmc"
-	depends on DRM && PCI && (ARM64 || COMPILE_TEST)
+	depends on DRM && PCI && (ARM64 || COMPILE_TEST) && MMU
 	select DRM_KMS_HELPER
 	select DRM_VRAM_HELPER
 	select DRM_TTM
-- 
2.17.1