drm/amdgpu: add pre_asic_init callback for SI

Nothing to do for this family.
Acked-by: Nirmoy Das <nirmoy.das@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1871,6 +1871,10 @@ static int si_set_vce_clocks(struct amdgpu_device *adev, u32 evclk, u32 ecclk)
 	return 0;
 }
 
+static void si_pre_asic_init(struct amdgpu_device *adev)
+{
+}
+
 static const struct amdgpu_asic_funcs si_asic_funcs =
 {
 	.read_disabled_bios = &si_read_disabled_bios,
@@ -1892,6 +1896,7 @@ static const struct amdgpu_asic_funcs si_asic_funcs =
 	.need_reset_on_init = &si_need_reset_on_init,
 	.get_pcie_replay_count = &si_get_pcie_replay_count,
 	.supports_baco = &si_asic_supports_baco,
+	.pre_asic_init = &si_pre_asic_init,
 };
 
 static uint32_t si_get_rev_id(struct amdgpu_device *adev)