drm/amdgpu: Fix size calculation when init onchip memory

Size is page count here.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: xinhui pan <xinhui.pan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

@@ -65,11 +65,11 @@
 
 static int amdgpu_ttm_init_on_chip(struct amdgpu_device *adev,
 				    unsigned int type,
-				    uint64_t size)
+				    uint64_t size_in_page)
 {
 	return ttm_range_man_init(&adev->mman.bdev, type,
 				  TTM_PL_FLAG_UNCACHED, TTM_PL_FLAG_UNCACHED,
-				  false, size >> PAGE_SHIFT);
+				  false, size_in_page);
 }
 
 /**