drm/amdkfd: Address 'remap_list' not described in 'svm_range_add'

Fixes the below:

drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:2073: warning: Function parameter or member 'remap_list' not described in 'svm_range_add'

Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Pan, Xinhui" <Xinhui.Pan@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>