Revert "drm/amdgpu: use HMM callback to replace mmu notifier"

This reverts commit 57731a07.

This depends on an HMM fix which is not upstream yet.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/Kconfig

@@ -26,10 +26,10 @@ config DRM_AMDGPU_CIK
 config DRM_AMDGPU_USERPTR
 	bool "Always enable userptr write support"
 	depends on DRM_AMDGPU
-	select HMM_MIRROR
+	select MMU_NOTIFIER
 	help
-	  This option selects CONFIG_HMM and CONFIG_HMM_MIRROR if it
-	  isn't already selected to enabled full userptr support.
+	  This option selects CONFIG_MMU_NOTIFIER if it isn't already
+	  selected to enabled full userptr support.
 
 config DRM_AMDGPU_GART_DEBUGFS
 	bool "Allow GART access through debugfs"

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -173,7 +173,7 @@ endif
 amdgpu-$(CONFIG_COMPAT) += amdgpu_ioc32.o
 amdgpu-$(CONFIG_VGA_SWITCHEROO) += amdgpu_atpx_handler.o
 amdgpu-$(CONFIG_ACPI) += amdgpu_acpi.o
-amdgpu-$(CONFIG_HMM_MIRROR) += amdgpu_mn.o
+amdgpu-$(CONFIG_MMU_NOTIFIER) += amdgpu_mn.o
 
 include $(FULL_AMD_PATH)/powerplay/Makefile
 

drivers/gpu/drm/amd/amdgpu/amdgpu_mn.h

@@ -34,7 +34,7 @@ enum amdgpu_mn_type {
 	AMDGPU_MN_TYPE_HSA,
 };
 
-#if defined(CONFIG_HMM_MIRROR)
+#if defined(CONFIG_MMU_NOTIFIER)
 void amdgpu_mn_lock(struct amdgpu_mn *mn);
 void amdgpu_mn_unlock(struct amdgpu_mn *mn);
 struct amdgpu_mn *amdgpu_mn_get(struct amdgpu_device *adev,